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Arsenic - Wikipedia

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class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Compounds"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Compounds</span> </div> </a> <button aria-controls="toc-Compounds-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Compounds subsection</span> </button> <ul id="toc-Compounds-sublist" class="vector-toc-list"> <li id="toc-Inorganic_compounds" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Inorganic_compounds"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Inorganic compounds</span> </div> </a> <ul id="toc-Inorganic_compounds-sublist" class="vector-toc-list"> <li id="toc-Alloys" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Alloys"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.1</span> <span>Alloys</span> </div> </a> <ul id="toc-Alloys-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Organoarsenic_compounds" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Organoarsenic_compounds"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Organoarsenic compounds</span> </div> </a> <ul id="toc-Organoarsenic_compounds-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Occurrence_and_production" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Occurrence_and_production"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Occurrence and production</span> </div> </a> <ul id="toc-Occurrence_and_production-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Applications" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Applications"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Applications</span> </div> </a> <button aria-controls="toc-Applications-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Applications subsection</span> </button> <ul id="toc-Applications-sublist" class="vector-toc-list"> <li id="toc-Agricultural" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Agricultural"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Agricultural</span> </div> </a> <ul id="toc-Agricultural-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Medical_use" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Medical_use"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Medical use</span> </div> </a> <ul id="toc-Medical_use-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Alloys_2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Alloys_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>Alloys</span> </div> </a> <ul id="toc-Alloys_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Military" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Military"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.4</span> <span>Military</span> </div> </a> <ul id="toc-Military-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other_uses" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Other_uses"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.5</span> <span>Other uses</span> </div> </a> <ul id="toc-Other_uses-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Biological_role" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Biological_role"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Biological role</span> </div> </a> <button aria-controls="toc-Biological_role-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Biological role subsection</span> </button> <ul id="toc-Biological_role-sublist" class="vector-toc-list"> <li id="toc-Bacteria" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bacteria"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.1</span> <span>Bacteria</span> </div> </a> <ul id="toc-Bacteria-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Potential_role_in_higher_animals" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Potential_role_in_higher_animals"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.2</span> <span>Potential role in higher animals</span> </div> </a> <ul id="toc-Potential_role_in_higher_animals-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Heredity" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Heredity"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.3</span> <span>Heredity</span> </div> </a> <ul id="toc-Heredity-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Biomethylation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Biomethylation"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.4</span> <span>Biomethylation</span> </div> </a> <ul id="toc-Biomethylation-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Environmental_issues" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Environmental_issues"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Environmental issues</span> </div> </a> <button aria-controls="toc-Environmental_issues-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Environmental issues subsection</span> </button> <ul id="toc-Environmental_issues-sublist" class="vector-toc-list"> <li id="toc-Exposure" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Exposure"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.1</span> <span>Exposure</span> </div> </a> <ul id="toc-Exposure-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Occurrence_in_drinking_water" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Occurrence_in_drinking_water"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.2</span> <span>Occurrence in drinking water</span> </div> </a> <ul id="toc-Occurrence_in_drinking_water-sublist" class="vector-toc-list"> <li id="toc-San_Pedro_de_Atacama" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#San_Pedro_de_Atacama"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.2.1</span> <span>San Pedro de Atacama</span> </div> </a> <ul id="toc-San_Pedro_de_Atacama-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hazard_maps_for_contaminated_groundwater" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Hazard_maps_for_contaminated_groundwater"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.2.2</span> <span>Hazard maps for contaminated groundwater</span> </div> </a> <ul id="toc-Hazard_maps_for_contaminated_groundwater-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Redox_transformation_of_arsenic_in_natural_waters" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Redox_transformation_of_arsenic_in_natural_waters"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.3</span> <span>Redox transformation of arsenic in natural waters</span> </div> </a> <ul id="toc-Redox_transformation_of_arsenic_in_natural_waters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Wood_preservation_in_the_US" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Wood_preservation_in_the_US"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.4</span> <span>Wood preservation in the US</span> </div> </a> <ul id="toc-Wood_preservation_in_the_US-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mapping_of_industrial_releases_in_the_US" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mapping_of_industrial_releases_in_the_US"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.5</span> <span>Mapping of industrial releases in the US</span> </div> </a> <ul id="toc-Mapping_of_industrial_releases_in_the_US-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bioremediation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bioremediation"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.6</span> <span>Bioremediation</span> </div> </a> <ul id="toc-Bioremediation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Arsenic_removal" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Arsenic_removal"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.7</span> <span>Arsenic removal</span> </div> </a> <ul id="toc-Arsenic_removal-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Toxicity_and_precautions" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Toxicity_and_precautions"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Toxicity and precautions</span> </div> </a> <button aria-controls="toc-Toxicity_and_precautions-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Toxicity and precautions subsection</span> </button> <ul id="toc-Toxicity_and_precautions-sublist" class="vector-toc-list"> <li id="toc-Classification" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Classification"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.1</span> <span>Classification</span> </div> </a> <ul id="toc-Classification-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Legal_limits,_food,_and_drink" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Legal_limits,_food,_and_drink"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.2</span> <span>Legal limits, food, and drink</span> </div> </a> <ul id="toc-Legal_limits,_food,_and_drink-sublist" class="vector-toc-list"> <li id="toc-Reducing_arsenic_content_in_rice" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Reducing_arsenic_content_in_rice"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.2.1</span> <span>Reducing arsenic content in rice</span> </div> </a> <ul id="toc-Reducing_arsenic_content_in_rice-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Occupational_exposure_limits" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Occupational_exposure_limits"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.3</span> <span>Occupational exposure limits</span> </div> </a> <ul id="toc-Occupational_exposure_limits-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ecotoxicity" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ecotoxicity"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.4</span> <span>Ecotoxicity</span> </div> </a> <ul id="toc-Ecotoxicity-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Toxicity_in_animals" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Toxicity_in_animals"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.5</span> <span>Toxicity in animals</span> </div> </a> <ul id="toc-Toxicity_in_animals-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Biological_mechanism" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Biological_mechanism"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.6</span> <span>Biological mechanism</span> </div> </a> <ul id="toc-Biological_mechanism-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Exposure_risks_and_remediation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Exposure_risks_and_remediation"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.7</span> <span>Exposure risks and remediation</span> </div> </a> <ul id="toc-Exposure_risks_and_remediation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Treatment" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Treatment"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.8</span> <span>Treatment</span> </div> </a> <ul id="toc-Treatment-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliography" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Bibliography"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Bibliography</span> </div> </a> <ul id="toc-Bibliography-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">13</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Arsenic</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 156 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-156" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">156 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Arseen" title="Arseen – Afrikaans" lang="af" hreflang="af" data-title="Arseen" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8A%A0%E1%88%AD%E1%88%B0%E1%8A%92%E1%8A%AD" title="አርሰኒክ – Amharic" lang="am" hreflang="am" data-title="አርሰኒክ" data-language-autonym="አማርኛ" data-language-local-name="Amharic" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-anp mw-list-item"><a href="https://anp.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Angika" lang="anp" hreflang="anp" data-title="आर्सेनिक" data-language-autonym="अंगिका" data-language-local-name="Angika" class="interlanguage-link-target"><span>अंगिका</span></a></li><li class="interlanguage-link interwiki-ar badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://ar.wikipedia.org/wiki/%D8%B2%D8%B1%D9%86%D9%8A%D8%AE" title="زرنيخ – Arabic" lang="ar" hreflang="ar" data-title="زرنيخ" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Arseni" title="Arseni – Aragonese" lang="an" hreflang="an" data-title="Arseni" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-hyw mw-list-item"><a href="https://hyw.wikipedia.org/wiki/%D5%84%D5%AF%D5%B6%D5%A4%D5%A5%D5%B2" title="Մկնդեղ – Western Armenian" lang="hyw" hreflang="hyw" data-title="Մկնդեղ" data-language-autonym="Արեւմտահայերէն" data-language-local-name="Western Armenian" class="interlanguage-link-target"><span>Արեւմտահայերէն</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Arsenic" title="Arsenic – Aromanian" lang="rup" hreflang="rup" data-title="Arsenic" data-language-autonym="Armãneashti" data-language-local-name="Aromanian" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Ars%C3%A9nicu" title="Arsénicu – Asturian" lang="ast" hreflang="ast" data-title="Arsénicu" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Awadhi" lang="awa" hreflang="awa" data-title="आर्सेनिक" data-language-autonym="अवधी" data-language-local-name="Awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/%C3%91ongatuita" title="Ñongatuita – Guarani" lang="gn" hreflang="gn" data-title="Ñongatuita" data-language-autonym="Avañe&#039;ẽ" data-language-local-name="Guarani" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Arsen" title="Arsen – Azerbaijani" lang="az" hreflang="az" data-title="Arsen" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%A2%D8%B1%D8%B3%D9%86%DB%8C%DA%A9" title="آرسنیک – South Azerbaijani" lang="azb" hreflang="azb" data-title="آرسنیک" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/Arsenik" title="Arsenik – Balinese" lang="ban" hreflang="ban" data-title="Arsenik" data-language-autonym="Basa Bali" data-language-local-name="Balinese" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%86%E0%A6%B0%E0%A7%8D%E0%A6%B8%E0%A7%87%E0%A6%A8%E0%A6%BF%E0%A6%95" title="আর্সেনিক – Bangla" lang="bn" hreflang="bn" data-title="আর্সেনিক" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Phi-s%C3%B2%CD%98" title="Phi-sò͘ – Minnan" lang="nan" hreflang="nan" data-title="Phi-sò͘" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%E2%80%99%D1%8F%D0%BA" title="Мыш’як – Belarusian" lang="be" hreflang="be" data-title="Мыш’як" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%90%D1%80%D1%88%D1%8D%D0%BD%D1%96%D0%BA" title="Аршэнік – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Аршэнік" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Bhojpuri" lang="bh" hreflang="bh" data-title="आर्सेनिक" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Arseniko" title="Arseniko – Central Bikol" lang="bcl" hreflang="bcl" data-title="Arseniko" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%90%D1%80%D1%81%D0%B5%D0%BD" title="Арсен – Bulgarian" lang="bg" hreflang="bg" data-title="Арсен" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%96%E0%BC%8B%E0%BD%96%E0%BE%B3%E0%BC%8D" title="བ་བླ། – Tibetan" lang="bo" hreflang="bo" data-title="བ་བླ།" data-language-autonym="བོད་ཡིག" data-language-local-name="Tibetan" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Arsen" title="Arsen – Bosnian" lang="bs" hreflang="bs" data-title="Arsen" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Arsenik" title="Arsenik – Breton" lang="br" hreflang="br" data-title="Arsenik" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Ars%C3%A8nic" title="Arsènic – Catalan" lang="ca" hreflang="ca" data-title="Arsènic" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9C%D0%B0%D1%80%D0%BA%C4%83%D0%BC%C4%83%D1%88" title="Маркăмăш – Chuvash" lang="cv" hreflang="cv" data-title="Маркăмăш" data-language-autonym="Чӑвашла" data-language-local-name="Chuvash" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Arsenico" title="Arsenico – Cebuano" lang="ceb" hreflang="ceb" data-title="Arsenico" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Arsen" title="Arsen – Czech" lang="cs" hreflang="cs" data-title="Arsen" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-co mw-list-item"><a href="https://co.wikipedia.org/wiki/Arsenicu" title="Arsenicu – Corsican" lang="co" hreflang="co" data-title="Arsenicu" data-language-autonym="Corsu" data-language-local-name="Corsican" class="interlanguage-link-target"><span>Corsu</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Arsenig" title="Arsenig – Welsh" lang="cy" hreflang="cy" data-title="Arsenig" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Arsen" title="Arsen – Danish" lang="da" hreflang="da" data-title="Arsen" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%AC%D8%B1%D9%86%D9%8A%D8%AC" title="جرنيج – Moroccan Arabic" lang="ary" hreflang="ary" data-title="جرنيج" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-de badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://de.wikipedia.org/wiki/Arsen" title="Arsen – German" lang="de" hreflang="de" data-title="Arsen" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Arseen" title="Arseen – Estonian" lang="et" hreflang="et" data-title="Arseen" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%91%CF%81%CF%83%CE%B5%CE%BD%CE%B9%CE%BA%CF%8C_(%CF%83%CF%84%CE%BF%CE%B9%CF%87%CE%B5%CE%AF%CE%BF)" title="Αρσενικό (στοιχείο) – Greek" lang="el" hreflang="el" data-title="Αρσενικό (στοιχείο)" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%D1%8C%D1%8F%D0%BA" title="Мышьяк – Erzya" lang="myv" hreflang="myv" data-title="Мышьяк" data-language-autonym="Эрзянь" data-language-local-name="Erzya" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ars%C3%A9nico" title="Arsénico – Spanish" lang="es" hreflang="es" data-title="Arsénico" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Arseno" title="Arseno – Esperanto" lang="eo" hreflang="eo" data-title="Arseno" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Artseniko" title="Artseniko – Basque" lang="eu" hreflang="eu" data-title="Artseniko" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A2%D8%B1%D8%B3%D9%86%DB%8C%DA%A9" title="آرسنیک – Persian" lang="fa" hreflang="fa" data-title="آرسنیک" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Arsenic" title="Arsenic – Fiji Hindi" lang="hif" hreflang="hif" data-title="Arsenic" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/Arsen" title="Arsen – Faroese" lang="fo" hreflang="fo" data-title="Arsen" data-language-autonym="Føroyskt" data-language-local-name="Faroese" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Arsenic" title="Arsenic – French" lang="fr" hreflang="fr" data-title="Arsenic" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fur mw-list-item"><a href="https://fur.wikipedia.org/wiki/Arsenic" title="Arsenic – Friulian" lang="fur" hreflang="fur" data-title="Arsenic" data-language-autonym="Furlan" data-language-local-name="Friulian" class="interlanguage-link-target"><span>Furlan</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Arsanaic" title="Arsanaic – Irish" lang="ga" hreflang="ga" data-title="Arsanaic" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Arsnick" title="Arsnick – Manx" lang="gv" hreflang="gv" data-title="Arsnick" data-language-autonym="Gaelg" data-language-local-name="Manx" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Arsnaig" title="Arsnaig – Scottish Gaelic" lang="gd" hreflang="gd" data-title="Arsnaig" data-language-autonym="Gàidhlig" data-language-local-name="Scottish Gaelic" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Ars%C3%A9nico" title="Arsénico – Galician" lang="gl" hreflang="gl" data-title="Arsénico" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%B8%E0%AB%8B%E0%AA%AE%E0%AA%B2" title="સોમલ – Gujarati" lang="gu" hreflang="gu" data-title="સોમલ" data-language-autonym="ગુજરાતી" data-language-local-name="Gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/Ph%C3%AE" title="Phî – Hakka Chinese" lang="hak" hreflang="hak" data-title="Phî" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="Hakka Chinese" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-xal mw-list-item"><a href="https://xal.wikipedia.org/wiki/%D0%90%D1%80%D1%81%D0%B5%D0%BD" title="Арсен – Kalmyk" lang="xal" hreflang="xal" data-title="Арсен" data-language-autonym="Хальмг" data-language-local-name="Kalmyk" class="interlanguage-link-target"><span>Хальмг</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B9%84%EC%86%8C" title="비소 – Korean" lang="ko" hreflang="ko" data-title="비소" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B1%D6%80%D5%BD%D5%A5%D5%B6" title="Արսեն – Armenian" lang="hy" hreflang="hy" data-title="Արսեն" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Hindi" lang="hi" hreflang="hi" data-title="आर्सेनिक" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Arsen" title="Arsen – Croatian" lang="hr" hreflang="hr" data-title="Arsen" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Arseno" title="Arseno – Ido" lang="io" hreflang="io" data-title="Arseno" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Arsen" title="Arsen – Indonesian" lang="id" hreflang="id" data-title="Arsen" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Arsenico" title="Arsenico – Interlingua" lang="ia" hreflang="ia" data-title="Arsenico" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-os mw-list-item"><a href="https://os.wikipedia.org/wiki/%D0%9C%D1%8B%D1%81%D1%82%D1%8B%D0%BC%D0%B0%D1%80%D0%B3" title="Мыстымарг – Ossetic" lang="os" hreflang="os" data-title="Мыстымарг" data-language-autonym="Ирон" data-language-local-name="Ossetic" class="interlanguage-link-target"><span>Ирон</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/IsAsumu" title="IsAsumu – Zulu" lang="zu" hreflang="zu" data-title="IsAsumu" data-language-autonym="IsiZulu" data-language-local-name="Zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Arsen" title="Arsen – Icelandic" lang="is" hreflang="is" data-title="Arsen" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Arsenico" title="Arsenico – Italian" lang="it" hreflang="it" data-title="Arsenico" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%A8%D7%A1%D7%9F" title="ארסן – Hebrew" lang="he" hreflang="he" data-title="ארסן" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Ars%C3%A8nik" title="Arsènik – Javanese" lang="jv" hreflang="jv" data-title="Arsènik" data-language-autonym="Jawa" data-language-local-name="Javanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-kbp mw-list-item"><a href="https://kbp.wikipedia.org/wiki/Ar%C9%A9s%C9%9Bn%C9%A9k%C9%A9" title="Arɩsɛnɩkɩ – Kabiye" lang="kbp" hreflang="kbp" data-title="Arɩsɛnɩkɩ" data-language-autonym="Kabɩyɛ" data-language-local-name="Kabiye" class="interlanguage-link-target"><span>Kabɩyɛ</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%86%E0%B2%B0%E0%B3%8D%E0%B2%B8%E0%B3%86%E0%B2%A8%E0%B2%BF%E0%B2%95%E0%B3%8D" title="ಆರ್ಸೆನಿಕ್ – Kannada" lang="kn" hreflang="kn" data-title="ಆರ್ಸೆನಿಕ್" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-pam mw-list-item"><a href="https://pam.wikipedia.org/wiki/Arseniku" title="Arseniku – Pampanga" lang="pam" hreflang="pam" data-title="Arseniku" data-language-autonym="Kapampangan" data-language-local-name="Pampanga" class="interlanguage-link-target"><span>Kapampangan</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%93%E1%83%90%E1%83%A0%E1%83%98%E1%83%A8%E1%83%AE%E1%83%90%E1%83%9C%E1%83%98" title="დარიშხანი – Georgian" lang="ka" hreflang="ka" data-title="დარიშხანი" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9A%D2%AF%D1%88%D3%99%D0%BD" title="Күшән – Kazakh" lang="kk" hreflang="kk" data-title="Күшән" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Arsenik" title="Arsenik – Cornish" lang="kw" hreflang="kw" data-title="Arsenik" data-language-autonym="Kernowek" data-language-local-name="Cornish" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Asenia" title="Asenia – Swahili" lang="sw" hreflang="sw" data-title="Asenia" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/%D0%95%D0%B4%D0%B6%D1%8B%D0%B4_%D0%B8%D0%B7" title="Еджыд из – Komi" lang="kv" hreflang="kv" data-title="Еджыд из" data-language-autonym="Коми" data-language-local-name="Komi" class="interlanguage-link-target"><span>Коми</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Asenik" title="Asenik – Haitian Creole" lang="ht" hreflang="ht" data-title="Asenik" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haitian Creole" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%D1%8C%D1%8F%D0%BA" title="Мышьяк – Kyrgyz" lang="ky" hreflang="ky" data-title="Мышьяк" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-mrj mw-list-item"><a href="https://mrj.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%D1%8C%D1%8F%D0%BA" title="Мышьяк – Western Mari" lang="mrj" hreflang="mrj" data-title="Мышьяк" data-language-autonym="Кырык мары" data-language-local-name="Western Mari" class="interlanguage-link-target"><span>Кырык мары</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Arsenicum" title="Arsenicum – Latin" lang="la" hreflang="la" data-title="Arsenicum" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Ars%C4%93ns" title="Arsēns – Latvian" lang="lv" hreflang="lv" data-title="Arsēns" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Arsen" title="Arsen – Luxembourgish" lang="lb" hreflang="lb" data-title="Arsen" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Arsenas" title="Arsenas – Lithuanian" lang="lt" hreflang="lt" data-title="Arsenas" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/Arsenico" title="Arsenico – Ligurian" lang="lij" hreflang="lij" data-title="Arsenico" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Arseen" title="Arseen – Limburgish" lang="li" hreflang="li" data-title="Arseen" data-language-autonym="Limburgs" data-language-local-name="Limburgish" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-olo mw-list-item"><a href="https://olo.wikipedia.org/wiki/Misjakku" title="Misjakku – Livvi-Karelian" lang="olo" hreflang="olo" data-title="Misjakku" data-language-autonym="Livvinkarjala" data-language-local-name="Livvi-Karelian" class="interlanguage-link-target"><span>Livvinkarjala</span></a></li><li class="interlanguage-link interwiki-jbo mw-list-item"><a href="https://jbo.wikipedia.org/wiki/arseniko" title="arseniko – Lojban" lang="jbo" hreflang="jbo" data-title="arseniko" data-language-autonym="La .lojban." data-language-local-name="Lojban" class="interlanguage-link-target"><span>La .lojban.</span></a></li><li class="interlanguage-link interwiki-lg mw-list-item"><a href="https://lg.wikipedia.org/wiki/Aseniki_(Arsenic)" title="Aseniki (Arsenic) – Ganda" lang="lg" hreflang="lg" data-title="Aseniki (Arsenic)" data-language-autonym="Luganda" data-language-local-name="Ganda" class="interlanguage-link-target"><span>Luganda</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Ars%C3%A9nich" title="Arsénich – Lombard" lang="lmo" hreflang="lmo" data-title="Arsénich" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Arz%C3%A9n_(elem)" title="Arzén (elem) – Hungarian" lang="hu" hreflang="hu" data-title="Arzén (elem)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%90%D1%80%D1%81%D0%B5%D0%BD" title="Арсен – Macedonian" lang="mk" hreflang="mk" data-title="Арсен" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Arsenika" title="Arsenika – Malagasy" lang="mg" hreflang="mg" data-title="Arsenika" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%86%E0%B5%BC%E0%B4%B8%E0%B5%86%E0%B4%A8%E0%B4%BF%E0%B4%95%E0%B5%8D" title="ആർസെനിക് – Malayalam" lang="ml" hreflang="ml" data-title="ആർസെനിക്" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Marathi" lang="mr" hreflang="mr" data-title="आर्सेनिक" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%B2%D8%B1%D9%86%D9%8A%D8%AE" title="زرنيخ – Egyptian Arabic" lang="arz" hreflang="arz" data-title="زرنيخ" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Arsenik" title="Arsenik – Malay" lang="ms" hreflang="ms" data-title="Arsenik" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Arsen" title="Arsen – Minangkabau" lang="min" hreflang="min" data-title="Arsen" data-language-autonym="Minangkabau" data-language-local-name="Minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Pi%C4%95_(ngu%C3%B2ng-s%C3%B3)" title="Piĕ (nguòng-só) – Mindong" lang="cdo" hreflang="cdo" data-title="Piĕ (nguòng-só)" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%A1%D1%83%D0%BB%D1%8F%D0%BC%D0%B0" title="Суляма – Moksha" lang="mdf" hreflang="mdf" data-title="Суляма" data-language-autonym="Мокшень" data-language-local-name="Moksha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A5%D2%AF%D0%BD%D1%86%D1%8D%D0%BB" title="Хүнцэл – Mongolian" lang="mn" hreflang="mn" data-title="Хүнцэл" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%85%E1%80%AD%E1%80%94%E1%80%BA%E1%80%96%E1%80%BC%E1%80%B0" title="စိန်ဖြူ – Burmese" lang="my" hreflang="my" data-title="စိန်ဖြူ" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Arseen" title="Arseen – Dutch" lang="nl" hreflang="nl" data-title="Arseen" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Newari" lang="new" hreflang="new" data-title="आर्सेनिक" data-language-autonym="नेपाल भाषा" data-language-local-name="Newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%92%E7%B4%A0" title="ヒ素 – Japanese" lang="ja" hreflang="ja" data-title="ヒ素" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Arseen" title="Arseen – Northern Frisian" lang="frr" hreflang="frr" data-title="Arseen" data-language-autonym="Nordfriisk" data-language-local-name="Northern Frisian" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Arsen" title="Arsen – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Arsen" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Arsen" title="Arsen – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Arsen" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-nov mw-list-item"><a href="https://nov.wikipedia.org/wiki/Arsene" title="Arsene – Novial" lang="nov" hreflang="nov" data-title="Arsene" data-language-autonym="Novial" data-language-local-name="Novial" class="interlanguage-link-target"><span>Novial</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Arsenic" title="Arsenic – Occitan" lang="oc" hreflang="oc" data-title="Arsenic" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%86%E0%AC%B0%E0%AD%8D%E0%AC%B8%E0%AD%87%E0%AC%A8%E0%AC%BF%E0%AC%95" title="ଆର୍ସେନିକ – Odia" lang="or" hreflang="or" data-title="ଆର୍ସେନିକ" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Margimush" title="Margimush – Uzbek" lang="uz" hreflang="uz" data-title="Margimush" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B8%E0%A9%B0%E0%A8%96%E0%A9%80%E0%A8%86" title="ਸੰਖੀਆ – Punjabi" lang="pa" hreflang="pa" data-title="ਸੰਖੀਆ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pi mw-list-item"><a href="https://pi.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Pali" lang="pi" hreflang="pi" data-title="आर्सेनिक" data-language-autonym="पालि" data-language-local-name="Pali" class="interlanguage-link-target"><span>पालि</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%A2%D8%B1%D8%B3%DB%8C%D9%86%DA%A9" title="آرسینک – Western Punjabi" lang="pnb" hreflang="pnb" data-title="آرسینک" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-blk mw-list-item"><a href="https://blk.wikipedia.org/wiki/%E1%80%A1%E1%80%AC%E1%80%9E%E1%80%B2%E1%80%94%E1%80%BA%E1%80%B8%E1%80%94%E1%80%B1%E1%80%80%E1%80%BA" title="အာသဲန်းနေက် – Pa&#039;O" lang="blk" hreflang="blk" data-title="အာသဲန်းနေက်" data-language-autonym="ပအိုဝ်ႏဘာႏသာႏ" data-language-local-name="Pa&#039;O" class="interlanguage-link-target"><span>ပအိုဝ်ႏဘာႏသာႏ</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%A2%D8%B1%D8%B3%DB%90%D9%86%D9%8A%DA%A9" title="آرسېنيک – Pashto" lang="ps" hreflang="ps" data-title="آرسېنيک" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-koi mw-list-item"><a href="https://koi.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%D1%8C%D1%8F%D0%BA" title="Мышьяк – Komi-Permyak" lang="koi" hreflang="koi" data-title="Мышьяк" data-language-autonym="Перем коми" data-language-local-name="Komi-Permyak" class="interlanguage-link-target"><span>Перем коми</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Ars%C3%A9nich" title="Arsénich – Piedmontese" lang="pms" hreflang="pms" data-title="Arsénich" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Arsen" title="Arsen – Low German" lang="nds" hreflang="nds" data-title="Arsen" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Arsen" title="Arsen – Polish" lang="pl" hreflang="pl" data-title="Arsen" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Ars%C3%AAnio" title="Arsênio – Portuguese" lang="pt" hreflang="pt" data-title="Arsênio" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Arsen" title="Arsen – Romanian" lang="ro" hreflang="ro" data-title="Arsen" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Arsiniku" title="Arsiniku – Quechua" lang="qu" hreflang="qu" data-title="Arsiniku" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%D1%8C%D1%8F%D0%BA" title="Мышьяк – Russian" lang="ru" hreflang="ru" data-title="Мышьяк" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%B8%E0%A5%87%E0%A4%A8%E0%A4%BF%E0%A4%95" title="आर्सेनिक – Sanskrit" lang="sa" hreflang="sa" data-title="आर्सेनिक" data-language-autonym="संस्कृतम्" data-language-local-name="Sanskrit" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/Ars%C3%A8nicu" title="Arsènicu – Sardinian" lang="sc" hreflang="sc" data-title="Arsènicu" data-language-autonym="Sardu" data-language-local-name="Sardinian" class="interlanguage-link-target"><span>Sardu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Airsenic" title="Airsenic – Scots" lang="sco" hreflang="sco" data-title="Airsenic" data-language-autonym="Scots" data-language-local-name="Scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/Arsen" title="Arsen – Saterland Frisian" lang="stq" hreflang="stq" data-title="Arsen" data-language-autonym="Seeltersk" data-language-local-name="Saterland Frisian" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Arseniku" title="Arseniku – Albanian" lang="sq" hreflang="sq" data-title="Arseniku" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Arsenicu" title="Arsenicu – Sicilian" lang="scn" hreflang="scn" data-title="Arsenicu" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Arsenic" title="Arsenic – Simple English" lang="en-simple" hreflang="en-simple" data-title="Arsenic" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D8%A2%D8%B1%D8%B3%D9%8A%D9%86%DA%AA" title="آرسينڪ – Sindhi" lang="sd" hreflang="sd" data-title="آرسينڪ" data-language-autonym="سنڌي" data-language-local-name="Sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Arz%C3%A9n" title="Arzén – Slovak" lang="sk" hreflang="sk" data-title="Arzén" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Arzen" title="Arzen – Slovenian" lang="sl" hreflang="sl" data-title="Arzen" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Aarsenik" title="Aarsenik – Somali" lang="so" hreflang="so" data-title="Aarsenik" data-language-autonym="Soomaaliga" data-language-local-name="Somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B2%DB%95%DA%95%D9%86%DB%8C%D8%AE" title="زەڕنیخ – Central Kurdish" lang="ckb" hreflang="ckb" data-title="زەڕنیخ" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%90%D1%80%D1%81%D0%B5%D0%BD" title="Арсен – Serbian" lang="sr" hreflang="sr" data-title="Арсен" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Arsen" title="Arsen – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Arsen" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Arsen" title="Arsen – Sundanese" lang="su" hreflang="su" data-title="Arsen" data-language-autonym="Sunda" data-language-local-name="Sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Arseeni" title="Arseeni – Finnish" lang="fi" hreflang="fi" data-title="Arseeni" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Arsenik" title="Arsenik – Swedish" lang="sv" hreflang="sv" data-title="Arsenik" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Arseniko" title="Arseniko – Tagalog" lang="tl" hreflang="tl" data-title="Arseniko" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%86%E0%AE%9A%E0%AE%A9%E0%AE%BF%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AF%81" title="ஆசனிக்கு – Tamil" lang="ta" hreflang="ta" data-title="ஆசனிக்கு" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Ihi%C7%A7%C7%A7" title="Ihiǧǧ – Kabyle" lang="kab" hreflang="kab" data-title="Ihiǧǧ" data-language-autonym="Taqbaylit" data-language-local-name="Kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%9C%D1%8B%D1%88%D1%8C%D1%8F%D0%BA" title="Мышьяк – Tatar" lang="tt" hreflang="tt" data-title="Мышьяк" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%86%E0%B0%B0%E0%B1%8D%E0%B0%B8%E0%B1%86%E0%B0%A8%E0%B0%BF%E0%B0%95%E0%B1%8D" title="ఆర్సెనిక్ – Telugu" lang="te" hreflang="te" data-title="ఆర్సెనిక్" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AA%E0%B8%B2%E0%B8%A3%E0%B8%AB%E0%B8%99%E0%B8%B9" title="สารหนู – Thai" lang="th" hreflang="th" data-title="สารหนู" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%90%D1%80%D1%81%D0%B5%D0%BD" title="Арсен – Tajik" lang="tg" hreflang="tg" data-title="Арсен" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Arsenik" title="Arsenik – Turkish" lang="tr" hreflang="tr" data-title="Arsenik" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%90%D1%80%D1%81%D0%B5%D0%BD" title="Арсен – Ukrainian" lang="uk" hreflang="uk" data-title="Арсен" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A2%D8%B1%D8%B3%DB%8C%D9%86%DA%A9" title="آرسینک – Urdu" lang="ur" hreflang="ur" data-title="آرسینک" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%D8%A6%D8%A7%D8%B1%D8%B3%DB%90%D9%86" title="ئارسېن – Uyghur" lang="ug" hreflang="ug" data-title="ئارسېن" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="Uyghur" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Arsen" title="Arsen – Veps" lang="vep" hreflang="vep" data-title="Arsen" data-language-autonym="Vepsän kel’" data-language-local-name="Veps" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Arsenic" title="Arsenic – Vietnamese" lang="vi" hreflang="vi" data-title="Arsenic" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E7%A0%B7" title="砷 – Literary Chinese" lang="lzh" hreflang="lzh" data-title="砷" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Arsenico" title="Arsenico – Waray" lang="war" hreflang="war" data-title="Arsenico" data-language-autonym="Winaray" data-language-local-name="Waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E7%A0%B7" title="砷 – Wu" lang="wuu" hreflang="wuu" data-title="砷" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%90%D7%A8%D7%A1%D7%A2%D7%A0%D7%99%D7%A7" title="ארסעניק – Yiddish" lang="yi" hreflang="yi" data-title="ארסעניק" data-language-autonym="ייִדיש" data-language-local-name="Yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/Arsenic" title="Arsenic – Yoruba" lang="yo" hreflang="yo" data-title="Arsenic" data-language-autonym="Yorùbá" data-language-local-name="Yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%A0%B7" title="砷 – Cantonese" lang="yue" hreflang="yue" data-title="砷" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%A0%B7" title="砷 – Chinese" lang="zh" hreflang="zh" data-title="砷" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a 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div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about the chemical element. For the poison commonly called "arsenic", see <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">arsenic trioxide</a>. For other uses, see <a href="/wiki/Arsenic_(disambiguation)" class="mw-disambig" title="Arsenic (disambiguation)">Arsenic (disambiguation)</a>.</div> <div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Chemical element with atomic number 33 (As)</div><style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><style data-mw-deduplicate="TemplateStyles:r1158442001">body.skin-minerva .mw-parser-output .infobox-full-data>.wikitable,body.skin-minerva .mw-parser-output .infobox .periodictable{display:table}body.skin-minerva .mw-parser-output .infobox-full-data{width:calc(100% - 20px)}body.skin-minerva .mw-parser-output .infobox-full-data>div{max-width:100%;overflow:auto}body.skin-minerva .mw-parser-output .infobox caption{display:table-caption}</style><table class="infobox"><caption class="infobox-title"><span class="nowrap">Arsenic,&#160;<sub>33</sub>As</span></caption><tbody><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Arsen_1a.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Arsen_1a.jpg/220px-Arsen_1a.jpg" decoding="async" width="220" height="126" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Arsen_1a.jpg/330px-Arsen_1a.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Arsen_1a.jpg/440px-Arsen_1a.jpg 2x" data-file-width="445" data-file-height="255" /></a></span></td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c">Arsenic</th></tr><tr><th scope="row" class="infobox-label">Pronunciation</th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist" style="margin: 0; text-align: left;"><ul><li style="margin: 0; text-indent: -1em; padding-left: 1em;"><span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/ˈ/: primary stress follows">ˈ</span><span title="/ɑːr/: &#39;ar&#39; in &#39;far&#39;">ɑːr</span><span title="&#39;s&#39; in &#39;sigh&#39;">s</span><span title="/ən/: &#39;on&#39; in &#39;button&#39;">ən</span><span title="/ɪ/: &#39;i&#39; in &#39;kit&#39;">ɪ</span><span title="&#39;k&#39; in &#39;kind&#39;">k</span></span>/</a></span></span><br />(<a href="/wiki/Help:Pronunciation_respelling_key" title="Help:Pronunciation respelling key"><i title="English pronunciation respelling"><span style="font-size:90%">AR</span>-sən-ik</i></a>)</li><li style="margin: 0; text-indent: -1em; padding-left: 1em;">as&#160;an&#160;adjective: <span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/ɑːr/: &#39;ar&#39; in &#39;far&#39;">ɑːr</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="&#39;s&#39; in &#39;sigh&#39;">s</span><span title="/ɛ/: &#39;e&#39; in &#39;dress&#39;">ɛ</span><span title="&#39;n&#39; in &#39;nigh&#39;">n</span><span title="/ɪ/: &#39;i&#39; in &#39;kit&#39;">ɪ</span><span title="&#39;k&#39; in &#39;kind&#39;">k</span></span>/</a></span></span><br />(<a href="/wiki/Help:Pronunciation_respelling_key" title="Help:Pronunciation respelling key"><i title="English pronunciation respelling">ar-<span style="font-size:90%">SEN</span>-ik</i></a>)</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Allotropy" title="Allotropy">Allotropes</a></th><td class="infobox-data">grey (most common), yellow, black (see <a href="/wiki/Allotropes_of_arsenic" title="Allotropes of arsenic">Allotropes of arsenic</a>)</td></tr><tr><th scope="row" class="infobox-label">Appearance</th><td class="infobox-data">metallic grey</td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th colspan="2" class="infobox-header" style="text-align: left; color:inherit; background: transparent;"><a href="/wiki/Standard_atomic_weight" title="Standard atomic weight">Standard atomic weight</a> <style data-mw-deduplicate="TemplateStyles:r886047488">.mw-parser-output .nobold{font-weight:normal}</style><span class="nobold"><i>A</i><sub>r</sub>&#176;(As)</span></th></tr><tr><th scope="row" class="infobox-label"></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span class="nowrap"><span data-sort-value="7001749215950000000♠"></span>74.921<span style="margin-left:.25em;">595</span><span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.000<span style="margin-left:.25em;">006</span></span><sup id="cite_ref-CIAAW_1-0" class="reference"><a href="#cite_note-CIAAW-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup></li><li><span class="nowrap"><span data-sort-value="7001749220000000000♠"></span>74.922<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.001</span>&#160;(<a href="/wiki/Standard_atomic_weight#Abridged_atomic_weight" title="Standard atomic weight">abridged</a>)<sup id="cite_ref-CIAAW2021_2-0" class="reference"><a href="#cite_note-CIAAW2021-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup></li></ul></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c">Arsenic in the <a href="/wiki/Periodic_table" title="Periodic table">periodic table</a></th></tr><tr><td colspan="2" class="infobox-full-data"> <table class="wikitable" style="text-align:center; width:100%; margin:0;"> <tbody><tr> <td> <table class="periodictable" style="margin:0 auto"> <tbody><tr> <td style="border:none; width:5px"><div style="background-color:transparent; color:inherit; margin:0; padding:0; text-align:center; border:none;"> <table style="empty-cells:hidden; border:none; padding:0; border-spacing:1px; border-collapse:separate; margin:0;"> <tbody><tr> <td style="border:none;padding:0;"><a href="/wiki/Hydrogen" title="Hydrogen"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Hydrogen</span></a> </td> <td colspan="30" style="border:none;padding:0;"> </td> <td style="border:none;padding:0;"><a href="/wiki/Helium" title="Helium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Helium</span></a> </td></tr> <tr> <td style="border:none;padding:0;"><a href="/wiki/Lithium" title="Lithium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Lithium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Beryllium" title="Beryllium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Beryllium</span></a> </td> <td colspan="24" style="border:none;padding:0;"> </td> <td style="border:none;padding:0;"><a href="/wiki/Boron" title="Boron"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Boron</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Carbon" title="Carbon"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Carbon</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Nitrogen" title="Nitrogen"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Nitrogen</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Oxygen" title="Oxygen"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Oxygen</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Fluorine" title="Fluorine"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Fluorine</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Neon" title="Neon"><span 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href="/wiki/Yttrium" title="Yttrium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Yttrium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Zirconium" title="Zirconium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Zirconium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Niobium" title="Niobium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Niobium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Molybdenum" title="Molybdenum"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Molybdenum</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Technetium" title="Technetium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Technetium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Ruthenium" title="Ruthenium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Ruthenium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Rhodium" title="Rhodium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Rhodium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Palladium" title="Palladium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Palladium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Silver" title="Silver"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Silver</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Cadmium" title="Cadmium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Cadmium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Indium" title="Indium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Indium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Tin" title="Tin"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Tin</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Antimony" title="Antimony"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Antimony</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Tellurium" title="Tellurium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Tellurium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Iodine" title="Iodine"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Iodine</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Xenon" title="Xenon"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Xenon</span></a> </td></tr> <tr style="border:none;padding:0;"> <td style="border:none;padding:0;"><a href="/wiki/Caesium" title="Caesium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Caesium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Barium" title="Barium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Barium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Lanthanum" title="Lanthanum"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Lanthanum</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Cerium" title="Cerium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Cerium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Praseodymium" title="Praseodymium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Praseodymium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Neodymium" title="Neodymium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Neodymium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Promethium" title="Promethium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Promethium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Samarium" title="Samarium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Samarium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Europium" title="Europium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Europium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Gadolinium" title="Gadolinium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Gadolinium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Terbium" title="Terbium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Terbium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Dysprosium" title="Dysprosium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Dysprosium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Holmium" title="Holmium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Holmium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Erbium" title="Erbium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Erbium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Thulium" title="Thulium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Thulium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Ytterbium" title="Ytterbium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Ytterbium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Lutetium" title="Lutetium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Lutetium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Hafnium" title="Hafnium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Hafnium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Tantalum" title="Tantalum"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Tantalum</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Tungsten" title="Tungsten"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Tungsten</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Rhenium" title="Rhenium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Rhenium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Osmium" title="Osmium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Osmium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Iridium" title="Iridium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Iridium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Platinum" title="Platinum"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Platinum</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Gold" title="Gold"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Gold</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Mercury_(element)" title="Mercury (element)"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Mercury (element)</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Thallium" title="Thallium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Thallium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Lead" title="Lead"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Lead</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Bismuth" title="Bismuth"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Bismuth</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Polonium" title="Polonium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Polonium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Astatine" title="Astatine"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Astatine</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Radon" title="Radon"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Radon</span></a> </td></tr> <tr> <td style="border:none;padding:0;"><a href="/wiki/Francium" title="Francium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Francium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Radium" title="Radium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#ff9999;">Radium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Actinium" title="Actinium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Actinium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Thorium" title="Thorium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Thorium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Protactinium" title="Protactinium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Protactinium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Uranium" title="Uranium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Uranium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Neptunium" title="Neptunium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Neptunium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Plutonium" title="Plutonium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Plutonium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Americium" title="Americium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Americium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Curium" title="Curium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Curium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Berkelium" title="Berkelium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Berkelium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Californium" title="Californium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Californium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Einsteinium" title="Einsteinium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Einsteinium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Fermium" title="Fermium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Fermium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Mendelevium" title="Mendelevium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Mendelevium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Nobelium" title="Nobelium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#9bff99;">Nobelium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Lawrencium" title="Lawrencium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Lawrencium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Rutherfordium" title="Rutherfordium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Rutherfordium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Dubnium" title="Dubnium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Dubnium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Seaborgium" title="Seaborgium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Seaborgium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Bohrium" title="Bohrium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Bohrium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Hassium" title="Hassium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Hassium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Meitnerium" title="Meitnerium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Meitnerium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Darmstadtium" title="Darmstadtium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Darmstadtium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Roentgenium" title="Roentgenium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Roentgenium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Copernicium" title="Copernicium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#99ccff;">Copernicium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Nihonium" title="Nihonium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Nihonium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Flerovium" title="Flerovium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Flerovium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Moscovium" title="Moscovium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Moscovium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Livermorium" title="Livermorium"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Livermorium</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Tennessine" title="Tennessine"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Tennessine</span></a> </td> <td style="border:none;padding:0;"><a href="/wiki/Oganesson" title="Oganesson"><span style="display:block;width:6px;height:8px;overflow:hidden;padding:0;color:transparent;background-color:#fdff8c;">Oganesson</span></a> </td></tr></tbody></table> </div> </td> <td style="vertical-align:middle; text-align:center; font-size:90%; line-height:100%; width:10px; border:none;"><a href="/wiki/Phosphorus" title="Phosphorus">P</a><br />↑<br /><strong>As</strong><br />↓<br /><a href="/wiki/Antimony" title="Antimony">Sb</a> </td></tr> <tr> <td colspan="2" class="nowrap" style="text-align:center; font-size:90%; line-height:100%; padding-top:0; padding-bottom:1px; border:none;"><a href="/wiki/Germanium" title="Germanium">germanium</a> ← <strong>arsenic</strong> → <a href="/wiki/Selenium" title="Selenium">selenium</a> </td></tr></tbody></table> </td></tr></tbody></table></td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap"><a href="/wiki/Atomic_number" title="Atomic number">Atomic number</a> <span style="font-weight:normal;">(<i>Z</i>)</span></span></th><td class="infobox-data">33</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Group_(periodic_table)" title="Group (periodic table)">Group</a></th><td class="infobox-data"><a href="/wiki/Pnictogen" title="Pnictogen">group&#160;15 (pnictogens)</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Period_(periodic_table)" title="Period (periodic table)">Period</a></th><td class="infobox-data"><a href="/wiki/Period_4_element" title="Period 4 element">period&#160;4</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Block_(periodic_table)" title="Block (periodic table)">Block</a></th><td class="infobox-data"><span title="color legend: p-block" style="display:inline-block; vertical-align:middle; width:6px; height:8px; border:1px solid black; background:#fdff8c; color:black;">&#160;</span> <a href="/wiki/Block_(periodic_table)#p-block" title="Block (periodic table)">p-block</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Electron_configuration" title="Electron configuration">Electron configuration</a></th><td class="infobox-data">&#91;<a href="/wiki/Argon" title="Argon">Ar</a>&#93; 3d<sup>10</sup> 4s<sup>2</sup> 4p<sup>3</sup></td></tr><tr><th scope="row" class="infobox-label">Electrons per shell</th><td class="infobox-data">2, 8, 18, 5</td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c">Physical properties</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Phase_(matter)" title="Phase (matter)">Phase</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold">at&#160;<span title="STP: standard temperature and pressure: 0&#160;°C and 101.325&#160;kPa"><a href="/wiki/Standard_temperature_and_pressure" title="Standard temperature and pressure">STP</a></span></span></th><td class="infobox-data"><a href="/wiki/Solid" title="Solid">solid</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Sublimation_(phase_transition)" title="Sublimation (phase transition)">Sublimation point</a></th><td class="infobox-data">887&#160;K&#x20;&#x200b;(615&#160;°C,&#x20;&#x200b;1137&#160;°F)&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Density" title="Density">Density</a><span style="font-weight:normal;"> (at&#160;20°&#160;C)</span></th><td class="infobox-data">grey: 5.782&#160;g/cm<sup>3</sup><sup id="cite_ref-Arblaster_2018_3-0" class="reference"><a href="#cite_note-Arblaster_2018-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><span style="font-weight:normal;">when&#160;liquid (at&#160;<a href="/wiki/Melting_point" title="Melting point">m.p.</a>)</span></th><td class="infobox-data">5.22&#160;g/cm<sup>3</sup>&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Triple_point" title="Triple point">Triple point</a></th><td class="infobox-data">1090&#160;K,&#x20;&#x200b;3628&#160;kPa<sup id="cite_ref-Gokcen1989_4-0" class="reference"><a href="#cite_note-Gokcen1989-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup>&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Critical_point_(thermodynamics)" title="Critical point (thermodynamics)">Critical point</a></th><td class="infobox-data">1673&#160;K,&#160;?&#160;MPa&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Enthalpy_of_fusion" title="Enthalpy of fusion">Heat of fusion</a></th><td class="infobox-data">grey: 24.44&#160;<a href="/wiki/Kilojoule_per_mole" class="mw-redirect" title="Kilojoule per mole">kJ/mol</a>&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Enthalpy_of_vaporization" title="Enthalpy of vaporization">Heat of vaporization</a></th><td class="infobox-data">34.76&#160;kJ/mol&#x20;(?)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Molar_heat_capacity" title="Molar heat capacity">Molar heat capacity</a></th><td class="infobox-data">24.64&#160;J/(mol·K)&#x20;</td></tr><tr><td colspan="2" class="infobox-full-data"><a href="/wiki/Vapor_pressure" title="Vapor pressure"><b>Vapor&#160;pressure</b></a><div style="position:relative; margin:0 auto; padding:0; text-align:initial; width:-moz-fit-content;width:-webkit-fit-content;width:fit-content;"> <table class="wikitable" style="text-align:center; font-size:90%; border-collapse:collapse; margin:0"> <tbody><tr> <th><abbr title="Pressure"><i>P</i></abbr>&#160;<span style="font-weight:normal;">(Pa)</span> </th> <th>1 </th> <th>10 </th> <th>100 </th> <th>1&#160;k </th> <th>10&#160;k </th> <th>100&#160;k </th></tr> <tr> <th>at&#160;<abbr title="Temperature"><i>T</i></abbr>&#160;<span style="font-weight:normal;">(K)</span> </th> <td>553 </td> <td>596 </td> <td>646 </td> <td>706 </td> <td>781 </td> <td>874 </td></tr></tbody></table> </div></td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c">Atomic properties</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Oxidation_state" title="Oxidation state">Oxidation states</a></th><td class="infobox-data">common: <span style="font-size:112%;">−3, +3, +5</span><br /> −2,<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> −1,<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> 0,<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> +1,<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> +2,<sup id="cite_ref-GE28_9-0" class="reference"><a href="#cite_note-GE28-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> +4<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Electronegativity" title="Electronegativity">Electronegativity</a></th><td class="infobox-data">Pauling&#160;scale: 2.18&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Ionization_energy" title="Ionization energy">Ionization energies</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>1st:&#160;947.0&#160;kJ/mol&#x20;</li><li>2nd:&#160;1798&#160;kJ/mol&#x20;</li><li>3rd:&#160;2735&#160;kJ/mol&#x20;</li><li>(<a href="/wiki/Molar_ionization_energies_of_the_elements#arsenic" title="Molar ionization energies of the elements">more</a>)&#x20;</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Atomic_radius" title="Atomic radius">Atomic radius</a></th><td class="infobox-data">empirical:&#x20;119&#160;<a href="/wiki/Picometre" title="Picometre">pm</a>&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Covalent_radius" title="Covalent radius">Covalent radius</a></th><td class="infobox-data">119±4&#160;pm&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Van_der_Waals_radius" title="Van der Waals radius">Van der Waals radius</a></th><td class="infobox-data">185&#160;pm&#x20;</td></tr><tr><td colspan="2" class="infobox-full-data"><figure class="mw-default-size mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:33_(As_I)_NIST_ASD_emission_spectrum.png" class="mw-file-description"><img alt="Color lines in a spectral range" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/33_%28As_I%29_NIST_ASD_emission_spectrum.png/240px-33_%28As_I%29_NIST_ASD_emission_spectrum.png" decoding="async" width="240" height="29" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/33_%28As_I%29_NIST_ASD_emission_spectrum.png/360px-33_%28As_I%29_NIST_ASD_emission_spectrum.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/21/33_%28As_I%29_NIST_ASD_emission_spectrum.png/480px-33_%28As_I%29_NIST_ASD_emission_spectrum.png 2x" data-file-width="4000" data-file-height="480" /></a><figcaption></figcaption></figure><strong><a href="/wiki/Spectral_line" title="Spectral line">Spectral lines</a> of arsenic</strong></td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c">Other properties</th></tr><tr><th scope="row" class="infobox-label">Natural occurrence</th><td class="infobox-data"><a href="/wiki/Primordial_nuclide" title="Primordial nuclide">primordial</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Crystal_structure" title="Crystal structure">Crystal structure</a></th><td class="infobox-data">grey:&#x20;&#x200b;<a href="/wiki/Trigonal_crystal_system" class="mw-redirect" title="Trigonal crystal system">rhombohedral</a>&#x20;(<a href="/wiki/Pearson_symbol" title="Pearson symbol">hR2</a>)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Lattice_constant" title="Lattice constant">Lattice constants</a></th><td class="infobox-data"><div style="float:right;"><span class="mw-default-size notpageimage skin-invert" typeof="mw:File/Frameless"><a href="/wiki/File:Rhombohedral.svg" class="mw-file-description"><img alt="Rhombohedral crystal structure for grey: arsenic" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Rhombohedral.svg/50px-Rhombohedral.svg.png" decoding="async" width="50" height="51" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Rhombohedral.svg/75px-Rhombohedral.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/03/Rhombohedral.svg/100px-Rhombohedral.svg.png 2x" data-file-width="139" data-file-height="141" /></a></span></div><i>a</i><sub>r</sub>&#160;=&#160;413.15&#160;pm<br />α&#160;=&#160;54.133°&#160;pm <i>a</i><sub>h</sub>&#160;=&#160;375.99&#160;pm<br /><i>c</i><sub>h</sub>&#160;=&#160;1054.58&#160;pm (at&#160;20&#160;°C)<sup id="cite_ref-Arblaster_2018_3-1" class="reference"><a href="#cite_note-Arblaster_2018-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Coefficient_of_thermal_expansion" class="mw-redirect" title="Coefficient of thermal expansion">Thermal expansion</a></th><td class="infobox-data">5.6&#160;µm/(m⋅K)<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup>&#x20;(at&#160;<abbr title="room temperature">r.t.</abbr>)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Thermal_conductivity" class="mw-redirect" title="Thermal conductivity">Thermal conductivity</a></th><td class="infobox-data">50.2&#160;W/(m⋅K)&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Electrical_resistivity_and_conductivity" title="Electrical resistivity and conductivity">Electrical resistivity</a></th><td class="infobox-data">333&#160;nΩ⋅m&#x20;(at&#160;20&#160;°C)&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Magnetism" title="Magnetism">Magnetic ordering</a></th><td class="infobox-data"><a href="/wiki/Diamagnetic" class="mw-redirect" title="Diamagnetic">diamagnetic</a><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup>&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Magnetic_susceptibility" title="Magnetic susceptibility">Molar magnetic susceptibility</a></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="3005450000000000000♠"></span>−5.5<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−6</sup></span>&#160;cm<sup>3</sup>/mol<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Young%27s_modulus" title="Young&#39;s modulus">Young's modulus</a></th><td class="infobox-data">8&#160;GPa&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Bulk_modulus" title="Bulk modulus">Bulk modulus</a></th><td class="infobox-data">22&#160;GPa&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Mohs_scale_of_mineral_hardness" class="mw-redirect" title="Mohs scale of mineral hardness">Mohs hardness</a></th><td class="infobox-data">3.5&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Brinell_hardness_test" title="Brinell hardness test">Brinell hardness</a></th><td class="infobox-data">1440&#160;MPa&#x20;</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/CAS_Registry_Number" title="CAS Registry Number">CAS Number</a></th><td class="infobox-data">7440-38-2&#x20;</td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c">History</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Timeline_of_chemical_element_discoveries" class="mw-redirect" title="Timeline of chemical element discoveries">Discovery</a></th><td class="infobox-data"><a href="/wiki/Alchemy_and_chemistry_in_the_medieval_Islamic_world" class="mw-redirect" title="Alchemy and chemistry in the medieval Islamic world">Arabic alchemists</a><span class="nowrap">&#x20;(before AD 815)</span></td></tr><tr><th colspan="2" class="infobox-header" style="color:inherit; background:#fdff8c"><a href="/wiki/Isotopes_of_arsenic" title="Isotopes of arsenic">Isotopes of arsenic</a><span style="float:right; padding-right: 0.2em;"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline 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abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Infobox_arsenic_isotopes" title="Template:Infobox arsenic isotopes"><abbr title="View this template">v</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Infobox_arsenic_isotopes" title="Special:EditPage/Template:Infobox arsenic isotopes"><abbr title="Edit this template">e</abbr></a></li></ul></div></span></th></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><td colspan="2" class="infobox-full-data"> <table class="wikitable" style="text-align: center; vertical-align: middle; width: 100%; border-collapse: collapse; margin: 0; padding: 0;"> <tbody><tr> <th colspan="3">Main isotopes<sup id="cite_ref-NUBASE2020_14-0" class="reference"><a href="#cite_note-NUBASE2020-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> </th> <th colspan="2"><a href="/wiki/Radioactive_decay" title="Radioactive decay">Decay</a> </th></tr> <tr> <th> </th> <th style="padding: 0.1em;"><a href="/wiki/Natural_abundance" title="Natural abundance">abun&#173;dance</a> </th> <th style="padding: 0.1em;"><a href="/wiki/Half-life" title="Half-life">half-life</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold">(<i>t</i><sub>1/2</sub>)</span> </th> <th style="padding: 0.1em;"><a href="/wiki/Radioactive_decay#Types_of_decay" title="Radioactive decay">mode</a> </th> <th style="padding: 0.1em;"><a href="/wiki/Decay_product" title="Decay product">pro&#173;duct</a> </th></tr> <tr> <th rowspan="2" style="vertical-align: top;"><sup>73</sup>As </th> <td rowspan="2" colspan="1" style="vertical-align: top; text-align: center;"><a href="/wiki/Synthetic_radioisotope" title="Synthetic radioisotope">synth</a> </td> <td rowspan="2" colspan="1" style="vertical-align: top; text-align: right;"><span class="nowrap"><span data-sort-value="7006693792000000000♠"></span>80.3&#160;d</span> </td> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;"><a href="/wiki/Electron_capture" title="Electron capture">ε</a></span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><a href="/wiki/Germanium-73" class="mw-redirect" title="Germanium-73"><sup>73</sup>Ge</a> </td></tr> <tr> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;"><a href="/wiki/Gamma_decay" class="mw-redirect" title="Gamma decay">γ</a></span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><sup></sup>– </td></tr> <tr> <th rowspan="4" style="vertical-align: top;"><sup>74</sup>As </th> <td rowspan="4" colspan="1" style="vertical-align: top; text-align: center;">synth </td> <td rowspan="4" colspan="1" style="vertical-align: top; text-align: right;"><span class="nowrap"><span data-sort-value="7006153792000000000♠"></span>17.8&#160;d</span> </td> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;">ε</span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><a href="/wiki/Germanium-74" class="mw-redirect" title="Germanium-74"><sup>74</sup>Ge</a> </td></tr> <tr> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;"><a href="/wiki/Beta_plus_decay" class="mw-redirect" title="Beta plus decay">β<sup>+</sup></a></span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><sup>74</sup>Ge </td></tr> <tr> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;">γ</span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><sup></sup>– </td></tr> <tr> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;"><a href="/wiki/Beta_minus_decay" class="mw-redirect" title="Beta minus decay">β<sup>−</sup></a></span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><a href="/wiki/Selenium-74" class="mw-redirect" title="Selenium-74"><sup>74</sup>Se</a> </td></tr> <tr> <th rowspan="1" style="vertical-align: top;"><sup>75</sup>As </th> <td rowspan="1" colspan="1" style="vertical-align: top; text-align: right;">100% </td> <td rowspan="1" colspan="3" style="vertical-align: top; text-align: left;">stable </td></tr></tbody></table></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-below noprint" style="color:inherit; background:#fdff8c"><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span>&#160;<a href="/wiki/Category:Arsenic" title="Category:Arsenic">Category: Arsenic</a><br /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist"><ul><li class="nv-view"><a href="/wiki/Template:Infobox_arsenic" title="Template:Infobox arsenic"><span title="View this template">view</span></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Infobox_arsenic" title="Template talk:Infobox arsenic"><span title="Discuss this template">talk</span></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Infobox_arsenic" title="Special:EditPage/Template:Infobox arsenic"><span title="Edit this template">edit</span></a></li></ul></div>&#x20;|&#x20;<a href="/wiki/List_of_data_references_for_chemical_elements" title="List of data references for chemical elements">references</a></td></tr></tbody></table> <p class="mw-empty-elt"> </p><p><b>Arsenic</b> is a <a href="/wiki/Chemical_element" title="Chemical element">chemical element</a> with the <a href="/wiki/Symbol_(chemistry)" class="mw-redirect" title="Symbol (chemistry)">symbol</a> <b>As</b> and the <a href="/wiki/Atomic_number" title="Atomic number">atomic number</a> 33. It is a <a href="/wiki/Metalloid" title="Metalloid">metalloid</a> and one of the <a href="/wiki/Pnictogens" class="mw-redirect" title="Pnictogens">pnictogens</a>, and therefore shares many properties with its <a href="/wiki/Group_15" class="mw-redirect" title="Group 15">group 15</a> neighbors <a href="/wiki/Phosphorus" title="Phosphorus">phosphorus</a> and <a href="/wiki/Antimony" title="Antimony">antimony</a>. Arsenic is a notoriously <a href="/wiki/Toxic_heavy_metal" title="Toxic heavy metal">toxic heavy metal</a>. It occurs naturally in many <a href="/wiki/Minerals" class="mw-redirect" title="Minerals">minerals</a>, usually in combination with <a href="/wiki/Sulfur" title="Sulfur">sulfur</a> and metals, but also as a pure elemental <a href="/wiki/Crystal" title="Crystal">crystal</a>. It has various <a href="/wiki/Allotropes_of_arsenic" title="Allotropes of arsenic">allotropes</a>, but only the grey form, which has a metallic appearance, is important to industry. </p><p>The primary use of arsenic is in alloys of lead (for example, in <a href="/wiki/Car_batteries" class="mw-redirect" title="Car batteries">car batteries</a> and <a href="/wiki/Ammunition" title="Ammunition">ammunition</a>). Arsenic is also a common n-type <a href="/wiki/Dopant" title="Dopant">dopant</a> in <a href="/wiki/Semiconductor" title="Semiconductor">semiconductor</a> electronic devices, and a component of the III–V <a href="/wiki/Compound_semiconductor" class="mw-redirect" title="Compound semiconductor">compound semiconductor</a> <a href="/wiki/Gallium_arsenide" title="Gallium arsenide">gallium arsenide</a>. Arsenic and its compounds, especially the trioxide, are used in the production of <a href="/wiki/Pesticide" title="Pesticide">pesticides</a>, treated wood products, <a href="/wiki/Herbicide" title="Herbicide">herbicides</a>, and <a href="/wiki/Insecticide" title="Insecticide">insecticides</a>. These applications are declining with the increasing recognition of the toxicity of arsenic and its compounds.<sup id="cite_ref-Ullmann_15-0" class="reference"><a href="#cite_note-Ullmann-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic has been known since ancient times to be poisonous to humans.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup> However, a few species of bacteria are able to use arsenic compounds as respiratory <a href="/wiki/Metabolite" title="Metabolite">metabolites</a>. Trace quantities of arsenic have been proposed to be an essential <a href="/wiki/Mineral_(nutrient)" title="Mineral (nutrient)">dietary element</a> in rats, hamsters, goats, and chickens. Research has not been conducted to determine whether small amounts of arsenic may play a role in human metabolism.<sup id="cite_ref-ANut_17-0" class="reference"><a href="#cite_note-ANut-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-UEssent_18-0" class="reference"><a href="#cite_note-UEssent-18"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> However, <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">arsenic poisoning</a> occurs in multicellular life if quantities are larger than needed. <a href="/wiki/Arsenic_contamination_of_groundwater" title="Arsenic contamination of groundwater">Arsenic contamination of groundwater</a> is a problem that affects millions of people across the world. </p><p>The United States' <a href="/wiki/Environmental_Protection_Agency" class="mw-redirect" title="Environmental Protection Agency">Environmental Protection Agency</a> states that all forms of arsenic are a serious risk to human health.<sup id="cite_ref-EPA1_19-0" class="reference"><a href="#cite_note-EPA1-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> The United States' <a href="/wiki/Agency_for_Toxic_Substances_and_Disease_Registry" title="Agency for Toxic Substances and Disease Registry">Agency for Toxic Substances and Disease Registry</a> ranked arsenic number 1 in its 2001 prioritized list of <a href="/wiki/Hazardous" class="mw-redirect" title="Hazardous">hazardous</a> substances at <a href="/wiki/Superfund" title="Superfund">Superfund</a> sites.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup> Arsenic is classified as a Group-A <a href="/wiki/Carcinogen" title="Carcinogen">carcinogen</a>.<sup id="cite_ref-EPA1_19-1" class="reference"><a href="#cite_note-EPA1-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Characteristics">Characteristics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=1" title="Edit section: Characteristics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Physical_characteristics">Physical characteristics</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=2" title="Edit section: Physical characteristics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Allotropes_of_arsenic" title="Allotropes of arsenic">Allotropes of arsenic</a></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:SbAs_lattice.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/SbAs_lattice.png/220px-SbAs_lattice.png" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/SbAs_lattice.png/330px-SbAs_lattice.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ec/SbAs_lattice.png/440px-SbAs_lattice.png 2x" data-file-width="1130" data-file-height="846" /></a><figcaption>Crystal structure common to <a href="/wiki/Antimony" title="Antimony">Sb</a>, <a href="/wiki/Stibarsen" title="Stibarsen">AsSb</a> and grey As</figcaption></figure> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Arsenic_nodule.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Arsenic_nodule.jpg/220px-Arsenic_nodule.jpg" decoding="async" width="220" height="293" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Arsenic_nodule.jpg/330px-Arsenic_nodule.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Arsenic_nodule.jpg/440px-Arsenic_nodule.jpg 2x" data-file-width="500" data-file-height="667" /></a><figcaption>Gray arsenic nodule</figcaption></figure> <p>The three most common arsenic <a href="/wiki/Allotropy" title="Allotropy">allotropes</a> are grey, yellow, and black arsenic, with grey being the most common.<sup id="cite_ref-Norman_21-0" class="reference"><a href="#cite_note-Norman-21"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> Grey arsenic (α-As, <a href="/wiki/Space_group" title="Space group">space group</a> R<span style="text-decoration:overline;">3</span>m No. 166) adopts a double-layered structure consisting of many interlocked, ruffled, six-membered rings. Because of weak bonding between the layers, grey arsenic is brittle and has a relatively low <a href="/wiki/Mohs_hardness" class="mw-redirect" title="Mohs hardness">Mohs hardness</a> of 3.5. Nearest and next-nearest neighbors form a distorted octahedral complex, with the three atoms in the same double-layer being slightly closer than the three atoms in the next.<sup id="cite_ref-Wiberg2001_22-0" class="reference"><a href="#cite_note-Wiberg2001-22"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> This relatively close packing leads to a high density of 5.73&#160;g/cm<sup>3</sup>.<sup id="cite_ref-Holl_23-0" class="reference"><a href="#cite_note-Holl-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Grey arsenic is a <a href="/wiki/Semimetal" title="Semimetal">semimetal</a>, but becomes a <a href="/wiki/Semiconductor" title="Semiconductor">semiconductor</a> with a <a href="/wiki/Bandgap" class="mw-redirect" title="Bandgap">bandgap</a> of 1.2–1.4&#160;eV if <a href="https://en.wiktionary.org/wiki/amorphized" class="extiw" title="wikt:amorphized">amorphized</a>.<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Grey arsenic is also the most stable form. Yellow arsenic is soft and waxy, and somewhat similar to <a href="/wiki/Tetraphosphorus" class="mw-redirect" title="Tetraphosphorus">tetraphosphorus</a> (<style data-mw-deduplicate="TemplateStyles:r1123817410">.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:left}.mw-parser-output sub.template-chem2-sub{font-size:80%;vertical-align:-0.35em}.mw-parser-output sup.template-chem2-sup{font-size:80%;vertical-align:0.65em}</style><span class="chemf nowrap">P<sub class="template-chem2-sub">4</sub></span>).<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> Both have four atoms arranged in a <a href="/wiki/Tetrahedral" class="mw-redirect" title="Tetrahedral">tetrahedral</a> structure in which each atom is bound to each of the other three atoms by a single bond. This unstable allotrope, being molecular, is the most volatile, least dense, and most toxic. Solid yellow arsenic is produced by rapid cooling of arsenic vapor, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">As<sub class="template-chem2-sub">4</sub></span>. It is rapidly transformed into grey arsenic by light. The yellow form has a density of 1.97&#160;g/cm<sup>3</sup>.<sup id="cite_ref-Holl_23-1" class="reference"><a href="#cite_note-Holl-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Black arsenic is similar in structure to <a href="/wiki/Black_phosphorus" class="mw-redirect" title="Black phosphorus">black phosphorus</a>.<sup id="cite_ref-Holl_23-2" class="reference"><a href="#cite_note-Holl-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Black arsenic can also be formed by cooling vapor at around 100–220&#160;°C and by crystallization of amorphous arsenic in the presence of mercury vapors.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> It is glassy and brittle. Black arsenic is also a poor electrical conductor.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic <a href="/wiki/Sublimation_(phase_transition)" title="Sublimation (phase transition)">sublimes</a> upon heating at <a href="/wiki/Atmospheric_pressure" title="Atmospheric pressure">atmospheric pressure</a>, converting directly to a gaseous form without an intervening liquid state at 887&#160;K (614&#160;°C). The <a href="/wiki/Triple_point" title="Triple point">triple point</a> is at 3.63&#160;MPa and 1,090&#160;K (820&#160;°C).<sup id="cite_ref-Holl_23-3" class="reference"><a href="#cite_note-Holl-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Gokcen1989_4-1" class="reference"><a href="#cite_note-Gokcen1989-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Isotopes">Isotopes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=3" title="Edit section: Isotopes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Isotopes_of_arsenic" title="Isotopes of arsenic">Isotopes of arsenic</a></div> <p>Arsenic occurs in nature as one stable <a href="/wiki/Isotope" title="Isotope">isotope</a>, <sup>75</sup>As, and is therefore called a <a href="/wiki/Monoisotopic_element" title="Monoisotopic element">monoisotopic element</a>.<sup id="cite_ref-NUBASE_28-0" class="reference"><a href="#cite_note-NUBASE-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> As of 2024, at least 32 <a href="/wiki/Radioisotope" class="mw-redirect" title="Radioisotope">radioisotopes</a> have also been synthesized, ranging in <a href="/wiki/Atomic_mass" title="Atomic mass">atomic mass</a> from 64 to 95.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-shimizu2024_30-0" class="reference"><a href="#cite_note-shimizu2024-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> The most stable of these is <sup>73</sup>As with a <a href="/wiki/Half-life" title="Half-life">half-life</a> of 80.30&#160;days. All other isotopes have half-lives of under one day, with the exception of <sup>71</sup>As (<i>t</i><sub>1/2</sub>=65.30 hours), <sup>72</sup>As (<i>t</i><sub>1/2</sub>=26.0 hours), <sup>74</sup>As (<i>t</i><sub>1/2</sub>=17.77 days), <sup>76</sup>As (<i>t</i><sub>1/2</sub>=26.26 hours), and <sup>77</sup>As (<i>t</i><sub>1/2</sub>=38.83 hours). Isotopes that are lighter than the stable <sup>75</sup>As tend to decay by <a href="/wiki/Beta_decay" title="Beta decay">β<sup>+</sup> decay</a>, and those that are heavier tend to decay by <a href="/wiki/Beta_decay" title="Beta decay">β<sup>−</sup> decay</a>, with some exceptions. </p><p>At least 10 <a href="/wiki/Nuclear_isomer" title="Nuclear isomer">nuclear isomers</a> have been described, ranging in atomic mass from 66 to 84. The most stable of arsenic's isomers is <sup>68m</sup>As with a half-life of 111&#160;seconds.<sup id="cite_ref-NUBASE_28-1" class="reference"><a href="#cite_note-NUBASE-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Chemistry">Chemistry</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=4" title="Edit section: Chemistry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic has a similar <a href="/wiki/Electronegativity" title="Electronegativity">electronegativity</a> and <a href="/wiki/Ionization_energies" class="mw-redirect" title="Ionization energies">ionization energies</a> to its lighter <a href="/wiki/Pnictogen" title="Pnictogen">pnictogen</a> <a href="/wiki/Congener_(chemistry)" title="Congener (chemistry)">congener</a> phosphorus and therefore readily forms <a href="/wiki/Covalent" class="mw-redirect" title="Covalent">covalent</a> molecules with most of the <a href="/wiki/Nonmetals" class="mw-redirect" title="Nonmetals">nonmetals</a>. Though stable in dry air, arsenic forms a golden-bronze <a href="/wiki/Tarnish" title="Tarnish">tarnish</a> upon exposure to humidity which eventually becomes a black surface layer.<sup id="cite_ref-Greenwood552_31-0" class="reference"><a href="#cite_note-Greenwood552-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> When heated in air, arsenic <a href="/wiki/Oxidation" class="mw-redirect" title="Oxidation">oxidizes</a> to <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">arsenic trioxide</a>; the fumes from this reaction have an odor resembling garlic. This odor can be detected on striking <a href="/wiki/Arsenide" title="Arsenide">arsenide</a> minerals such as <a href="/wiki/Arsenopyrite" title="Arsenopyrite">arsenopyrite</a> with a hammer.<sup id="cite_ref-Gokcen1989_4-2" class="reference"><a href="#cite_note-Gokcen1989-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> It burns in oxygen to form arsenic trioxide and <a href="/wiki/Arsenic_pentoxide" title="Arsenic pentoxide">arsenic pentoxide</a>, which have the same structure as the more well-known phosphorus compounds, and in fluorine to give <a href="/wiki/Arsenic_pentafluoride" title="Arsenic pentafluoride">arsenic pentafluoride</a>.<sup id="cite_ref-Greenwood552_31-1" class="reference"><a href="#cite_note-Greenwood552-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> Arsenic makes <a href="/wiki/Arsenic_acid" title="Arsenic acid">arsenic acid</a> with concentrated <a href="/wiki/Nitric_acid" title="Nitric acid">nitric acid</a>, <a href="/wiki/Arsenous_acid" title="Arsenous acid">arsenous acid</a> with dilute nitric acid, and <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">arsenic trioxide</a> with concentrated <a href="/wiki/Sulfuric_acid" title="Sulfuric acid">sulfuric acid</a>; however, it does not react with water, alkalis, or non-oxidising acids.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup> Arsenic reacts with metals to form <a href="/wiki/Arsenide" title="Arsenide">arsenides</a>, though these are not ionic compounds containing the As<sup>3−</sup> ion as the formation of such an anion would be highly endothermic and even the group 1 arsenides have properties of <a href="/wiki/Intermetallic" title="Intermetallic">intermetallic</a> compounds.<sup id="cite_ref-Greenwood552_31-2" class="reference"><a href="#cite_note-Greenwood552-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> Like <a href="/wiki/Germanium" title="Germanium">germanium</a>, <a href="/wiki/Selenium" title="Selenium">selenium</a>, and <a href="/wiki/Bromine" title="Bromine">bromine</a>, which like arsenic <a href="/wiki/D-block_contraction" title="D-block contraction">succeed the 3d transition series</a>, arsenic is much less stable in the +5 <a href="/wiki/Oxidation_state" title="Oxidation state">oxidation state</a> than its vertical neighbors phosphorus and <a href="/wiki/Antimony" title="Antimony">antimony</a>, and hence arsenic pentoxide and arsenic acid are potent <a href="/wiki/Oxidizers" class="mw-redirect" title="Oxidizers">oxidizers</a>.<sup id="cite_ref-Greenwood552_31-3" class="reference"><a href="#cite_note-Greenwood552-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Compounds">Compounds</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=5" title="Edit section: Compounds"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable selfref">See also: <a href="/wiki/Category:Arsenic_compounds" title="Category:Arsenic compounds">Category:Arsenic compounds</a></div> <p>Compounds of arsenic resemble, in some respects, those of <a href="/wiki/Phosphorus" title="Phosphorus">phosphorus</a>, which occupies the same <a href="/wiki/Group_(periodic_table)" title="Group (periodic table)">group</a> (column) of the <a href="/wiki/Periodic_table" title="Periodic table">periodic table</a>. The most common <a href="/wiki/Oxidation_state" title="Oxidation state">oxidation states</a> for arsenic are: −3 in the <a href="/wiki/Arsenide" title="Arsenide">arsenides</a>, which are alloy-like intermetallic compounds, +3 in the <a href="/wiki/Arsenite" title="Arsenite">arsenites</a>, and +5 in the <a href="/wiki/Arsenates" class="mw-redirect" title="Arsenates">arsenates</a> and most organoarsenic compounds. Arsenic also bonds readily to itself as seen in the square <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">As<span class="template-chem2-su"><span>3−</span><span>4</span></span></span> ions in the mineral <a href="/wiki/Skutterudite" title="Skutterudite">skutterudite</a>.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> In the +3 <a href="/wiki/Oxidation_state" title="Oxidation state">oxidation state</a>, arsenic is typically pyramidal owing to the influence of the <a href="/wiki/Lone_pair" title="Lone pair">lone pair</a> of <a href="/wiki/Electron" title="Electron">electrons</a>.<sup id="cite_ref-Norman_21-1" class="reference"><a href="#cite_note-Norman-21"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Inorganic_compounds">Inorganic compounds</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=6" title="Edit section: Inorganic compounds"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>One of the simplest arsenic compounds is the trihydride, the highly toxic, flammable, <a href="/wiki/Pyrophoricity" title="Pyrophoricity">pyrophoric</a> <a href="/wiki/Arsine" title="Arsine">arsine</a> (AsH<sub>3</sub>). This compound is generally regarded as stable, since at room temperature it decomposes only slowly. At temperatures of 250–300&#160;°C decomposition to arsenic and hydrogen is rapid.<sup id="cite_ref-Greenwood557_34-0" class="reference"><a href="#cite_note-Greenwood557-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> Several factors, such as <a href="/wiki/Humidity" title="Humidity">humidity</a>, presence of light and certain <a href="/wiki/Catalyst" class="mw-redirect" title="Catalyst">catalysts</a> (namely aluminium) facilitate the rate of decomposition.<sup id="cite_ref-INRS_35-0" class="reference"><a href="#cite_note-INRS-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup> It oxidises readily in air to form arsenic trioxide and water, and analogous reactions take place with <a href="/wiki/Sulfur" title="Sulfur">sulfur</a> and <a href="/wiki/Selenium" title="Selenium">selenium</a> instead of <a href="/wiki/Oxygen" title="Oxygen">oxygen</a>.<sup id="cite_ref-Greenwood557_34-1" class="reference"><a href="#cite_note-Greenwood557-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic forms colorless, odorless, crystalline <a href="/wiki/Oxide" title="Oxide">oxides</a> <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">As<sub>2</sub>O<sub>3</sub></a> ("<a href="/wiki/White_arsenic" class="mw-redirect" title="White arsenic">white arsenic</a>") and <a href="/wiki/Arsenic_pentoxide" title="Arsenic pentoxide">As<sub>2</sub>O<sub>5</sub></a> which are <a href="/wiki/Hygroscopic" class="mw-redirect" title="Hygroscopic">hygroscopic</a> and readily soluble in water to form acidic solutions. <a href="/wiki/Arsenic_acid" title="Arsenic acid">Arsenic(V) acid</a> is a weak acid and its salts, known as <a href="/wiki/Arsenate" title="Arsenate">arsenates</a>,<sup id="cite_ref-Greenwood572_36-0" class="reference"><a href="#cite_note-Greenwood572-36"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> are a major source of <a href="/wiki/Arsenic_contamination_of_groundwater" title="Arsenic contamination of groundwater">arsenic contamination of groundwater</a> in regions with high levels of naturally-occurring arsenic minerals.<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> Synthetic arsenates include <a href="/wiki/Scheele%27s_Green" class="mw-redirect" title="Scheele&#39;s Green">Scheele's Green</a> (cupric hydrogen arsenate, acidic copper arsenate), <a href="/wiki/Calcium_arsenate" title="Calcium arsenate">calcium arsenate</a>, and <a href="/wiki/Lead_hydrogen_arsenate" title="Lead hydrogen arsenate">lead hydrogen arsenate</a>. These three have been used as agricultural <a href="/wiki/Insecticide" title="Insecticide">insecticides</a> and <a href="/wiki/Poison" title="Poison">poisons</a>. </p><p>The <a href="/wiki/Protonation" title="Protonation">protonation</a> steps between the arsenate and arsenic acid are similar to those between <a href="/wiki/Phosphate" title="Phosphate">phosphate</a> and <a href="/wiki/Phosphoric_acid" title="Phosphoric acid">phosphoric acid</a>. Unlike <a href="/wiki/Phosphorous_acid" title="Phosphorous acid">phosphorous acid</a>, <a href="/wiki/Arsenous_acid" title="Arsenous acid">arsenous acid</a> is genuinely tribasic, with the formula As(OH)<sub>3</sub>.<sup id="cite_ref-Greenwood572_36-1" class="reference"><a href="#cite_note-Greenwood572-36"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> </p><p>A broad variety of sulfur compounds of arsenic are known. Orpiment (<a href="/wiki/Arsenic_trisulfide" title="Arsenic trisulfide">As<sub>2</sub>S<sub>3</sub></a>) and realgar (<a href="/wiki/Tetraarsenic_tetrasulfide" class="mw-redirect" title="Tetraarsenic tetrasulfide">As<sub>4</sub>S<sub>4</sub></a>) are somewhat abundant and were formerly used as painting pigments. In As<sub>4</sub>S<sub>10</sub>, arsenic has a formal oxidation state of +2 in As<sub>4</sub>S<sub>4</sub> which features As-As bonds so that the total covalency of As is still 3.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup> Both orpiment and realgar, as well as As<sub>4</sub>S<sub>3</sub>, have selenium analogs; the analogous As<sub>2</sub>Te<sub>3</sub> is known as the mineral <a href="/wiki/Kalgoorlieite" title="Kalgoorlieite">kalgoorlieite</a>,<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup> and the anion As<sub>2</sub>Te<sup>−</sup> is known as a ligand in <a href="/wiki/Cobalt" title="Cobalt">cobalt</a> complexes.<sup id="cite_ref-Greenwood578_40-0" class="reference"><a href="#cite_note-Greenwood578-40"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p>All trihalides of arsenic(III) are well known except the astatide, which is unknown. <a href="/wiki/Arsenic_pentafluoride" title="Arsenic pentafluoride">Arsenic pentafluoride</a> (AsF<sub>5</sub>) is the only important pentahalide, reflecting the lower stability of the +5 oxidation state; even so, it is a very strong fluorinating and oxidizing agent. (The <a href="/wiki/Arsenic_pentachloride" title="Arsenic pentachloride">pentachloride</a> is stable only below −50&#160;°C, at which temperature it decomposes to the trichloride, releasing chlorine gas.<sup id="cite_ref-Holl_23-4" class="reference"><a href="#cite_note-Holl-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup>) </p> <div class="mw-heading mw-heading4"><h4 id="Alloys">Alloys</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=7" title="Edit section: Alloys"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic is used as the group 5 element in the <a href="/wiki/III-V_semiconductor" class="mw-redirect" title="III-V semiconductor">III-V semiconductors</a> <a href="/wiki/Gallium_arsenide" title="Gallium arsenide">gallium arsenide</a>, <a href="/wiki/Indium_arsenide" title="Indium arsenide">indium arsenide</a>, and <a href="/wiki/Aluminium_arsenide" title="Aluminium arsenide">aluminium arsenide</a>.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> The valence electron count of GaAs is the same as a pair of Si atoms, but the <a href="/wiki/Electronic_band_structure" title="Electronic band structure">band structure</a> is completely different which results in distinct bulk properties.<sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup> Other arsenic alloys include the II-V semiconductor <a href="/wiki/Cadmium_arsenide" title="Cadmium arsenide">cadmium arsenide</a>.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Organoarsenic_compounds">Organoarsenic compounds</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=8" title="Edit section: Organoarsenic compounds"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Organoarsenic_chemistry" title="Organoarsenic chemistry">Organoarsenic chemistry</a></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Trimethylarsine-2D.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Trimethylarsine-2D.png/90px-Trimethylarsine-2D.png" decoding="async" width="90" height="46" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Trimethylarsine-2D.png/135px-Trimethylarsine-2D.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Trimethylarsine-2D.png/180px-Trimethylarsine-2D.png 2x" data-file-width="1100" data-file-height="568" /></a><figcaption><a href="/wiki/Trimethylarsine" title="Trimethylarsine">Trimethylarsine</a></figcaption></figure> <p>A large variety of organoarsenic compounds are known. Several were developed as <a href="/wiki/Chemical_weapon" title="Chemical weapon">chemical warfare agents</a> during World War I, including <a href="/wiki/Blister_agent" title="Blister agent">vesicants</a> such as <a href="/wiki/Lewisite" title="Lewisite">lewisite</a> and vomiting agents such as <a href="/wiki/Adamsite" title="Adamsite">adamsite</a>.<sup id="cite_ref-Ellison2007_44-0" class="reference"><a href="#cite_note-Ellison2007-44"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Girard2010_45-0" class="reference"><a href="#cite_note-Girard2010-45"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Somani2001_46-0" class="reference"><a href="#cite_note-Somani2001-46"><span class="cite-bracket">&#91;</span>46<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Cacodylic_acid" title="Cacodylic acid">Cacodylic acid</a>, which is of historic and practical interest, arises from the <a href="/wiki/Methylation" title="Methylation">methylation</a> of arsenic trioxide, a reaction that has no analogy in phosphorus chemistry. <a href="/wiki/Cacodyl" title="Cacodyl">Cacodyl</a> was the first organometallic compound known (even though arsenic is not a true metal) and was named from the Greek <i>κακωδία</i> "stink" for its offensive, garlic-like odor; it is very toxic.<sup id="cite_ref-Greenwood584_47-0" class="reference"><a href="#cite_note-Greenwood584-47"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> </p> <div style="clear:left;" class=""></div> <div class="mw-heading mw-heading2"><h2 id="Occurrence_and_production">Occurrence and production</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=9" title="Edit section: Occurrence and production"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Category:Arsenide_minerals" title="Category:Arsenide minerals">Arsenide minerals</a> and <a href="/wiki/Category:Arsenate_minerals" title="Category:Arsenate minerals">Arsenate minerals</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Native_arsenic.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Native_arsenic.jpg/200px-Native_arsenic.jpg" decoding="async" width="200" height="184" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Native_arsenic.jpg/300px-Native_arsenic.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Native_arsenic.jpg/400px-Native_arsenic.jpg 2x" data-file-width="637" data-file-height="585" /></a><figcaption>A large sample of native arsenic from <a href="/wiki/Sainte-Marie-aux-Mines" title="Sainte-Marie-aux-Mines">Sainte-Marie-aux-Mines</a>, France</figcaption></figure> <p>Arsenic is the 53rd most abundant element in the <a href="/wiki/Earth%27s_crust" title="Earth&#39;s crust">Earth's crust</a>, comprising about 1.5&#160;<a href="/wiki/Parts_per_million" class="mw-redirect" title="Parts per million">parts per million</a>&#160;(0.00015%).<sup id="cite_ref-48" class="reference"><a href="#cite_note-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> Typical background concentrations of arsenic do not exceed 3&#160;ng/m<sup>3</sup> in the atmosphere; 100&#160;mg/kg in soil; 400&#160;μg/kg in vegetation; 10&#160;μg/L in freshwater and 1.5&#160;μg/L in seawater.<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> Arsenic is the 22nd most abundant element in seawater<sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup> and ranks 41st in abundance in the universe.<sup id="cite_ref-51" class="reference"><a href="#cite_note-51"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Reliable_sources" title="Wikipedia:Reliable sources"><span title="The material near this tag may rely on an unreliable source. (December 2024)">unreliable source?</span></a></i>&#93;</sup> </p><p>Minerals with the formula MAsS and MAs<sub>2</sub> (M = <a href="/wiki/Iron" title="Iron">Fe</a>, <a href="/wiki/Nickel" title="Nickel">Ni</a>, <a href="/wiki/Cobalt" title="Cobalt">Co</a>) are the dominant commercial sources of arsenic, together with <a href="/wiki/Realgar" title="Realgar">realgar</a> (an arsenic sulfide mineral) and native (elemental) arsenic. An illustrative mineral is <a href="/wiki/Arsenopyrite" title="Arsenopyrite">arsenopyrite</a> (<a href="/wiki/Iron" title="Iron">Fe</a>As<a href="/wiki/Sulfur" title="Sulfur">S</a>), which is structurally related to <a href="/wiki/Iron_pyrite" class="mw-redirect" title="Iron pyrite">iron pyrite</a>. Many minor As-containing minerals are known. Arsenic also occurs in various organic forms in the environment.<sup id="cite_ref-geosphere_52-0" class="reference"><a href="#cite_note-geosphere-52"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:World_Arsenic_Production_2006.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/World_Arsenic_Production_2006.svg/250px-World_Arsenic_Production_2006.svg.png" decoding="async" width="250" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/World_Arsenic_Production_2006.svg/375px-World_Arsenic_Production_2006.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/be/World_Arsenic_Production_2006.svg/500px-World_Arsenic_Production_2006.svg.png 2x" data-file-width="940" data-file-height="415" /></a><figcaption>Arsenic output in 2006<sup id="cite_ref-USGSCS2006_53-0" class="reference"><a href="#cite_note-USGSCS2006-53"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup></figcaption></figure> <p>In 2014, China was the top producer of white arsenic with almost 70% world share, followed by Morocco, Russia, and Belgium, according to the <a href="/wiki/British_Geological_Survey" title="British Geological Survey">British Geological Survey</a> and the <a href="/wiki/United_States_Geological_Survey" title="United States Geological Survey">United States Geological Survey</a>.<sup id="cite_ref-USGSCS2016_54-0" class="reference"><a href="#cite_note-USGSCS2016-54"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup> Most arsenic refinement operations in the US and Europe have closed over environmental concerns. Arsenic is found in the smelter dust from copper, gold, and lead smelters, and is recovered primarily from copper refinement dust.<sup id="cite_ref-USGSYB2007_55-0" class="reference"><a href="#cite_note-USGSYB2007-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> </p><p>On <a href="/wiki/Roasting_(metallurgy)" title="Roasting (metallurgy)">roasting</a> arsenopyrite in air, arsenic sublimes as arsenic(III) oxide leaving iron oxides,<sup id="cite_ref-geosphere_52-1" class="reference"><a href="#cite_note-geosphere-52"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup> while roasting without air results in the production of gray arsenic. Further purification from sulfur and other chalcogens is achieved by <a href="/wiki/Sublimation_(phase_transition)" title="Sublimation (phase transition)">sublimation</a> in vacuum, in a hydrogen atmosphere, or by distillation from molten lead-arsenic mixture.<sup id="cite_ref-56" class="reference"><a href="#cite_note-56"><span class="cite-bracket">&#91;</span>56<span class="cite-bracket">&#93;</span></a></sup> </p> <table class="wikitable sortable"> <tbody><tr> <th>Rank</th> <th>Country</th> <th>2014 <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">As<sub>2</sub>O<sub>3</sub></a> Production<sup id="cite_ref-USGSCS2016_54-1" class="reference"><a href="#cite_note-USGSCS2016-54"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup> </th></tr> <tr> <td>1</td> <td><span class="flagicon"><span class="mw-image-border" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Flag_of_the_People%27s_Republic_of_China.svg/23px-Flag_of_the_People%27s_Republic_of_China.svg.png" decoding="async" width="23" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Flag_of_the_People%27s_Republic_of_China.svg/35px-Flag_of_the_People%27s_Republic_of_China.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Flag_of_the_People%27s_Republic_of_China.svg/45px-Flag_of_the_People%27s_Republic_of_China.svg.png 2x" data-file-width="900" data-file-height="600" /></span></span>&#160;</span><a href="/wiki/China" title="China">China</a></td> <td>25,000 T </td></tr> <tr> <td>2</td> <td><span class="flagicon"><span class="mw-image-border" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Flag_of_Morocco.svg/23px-Flag_of_Morocco.svg.png" decoding="async" width="23" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Flag_of_Morocco.svg/35px-Flag_of_Morocco.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Flag_of_Morocco.svg/45px-Flag_of_Morocco.svg.png 2x" data-file-width="900" data-file-height="600" /></span></span>&#160;</span><a href="/wiki/Morocco" title="Morocco">Morocco</a></td> <td>8,800 T </td></tr> <tr> <td>3</td> <td><span class="flagicon"><span class="mw-image-border" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/f/f3/Flag_of_Russia.svg/23px-Flag_of_Russia.svg.png" decoding="async" width="23" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/f3/Flag_of_Russia.svg/35px-Flag_of_Russia.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/f3/Flag_of_Russia.svg/45px-Flag_of_Russia.svg.png 2x" data-file-width="900" data-file-height="600" /></span></span>&#160;</span><a href="/wiki/Russia" title="Russia">Russia</a></td> <td>1,500 T </td></tr> <tr> <td>4</td> <td><span class="flagicon"><span class="mw-image-border" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Flag_of_Belgium_%28civil%29.svg/23px-Flag_of_Belgium_%28civil%29.svg.png" decoding="async" width="23" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/92/Flag_of_Belgium_%28civil%29.svg/35px-Flag_of_Belgium_%28civil%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/92/Flag_of_Belgium_%28civil%29.svg/45px-Flag_of_Belgium_%28civil%29.svg.png 2x" data-file-width="900" data-file-height="600" /></span></span>&#160;</span><a href="/wiki/Belgium" title="Belgium">Belgium</a></td> <td>1,000 T </td></tr> <tr> <td>5</td> <td><span class="flagicon"><span class="mw-image-border" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/48/Flag_of_Bolivia.svg/22px-Flag_of_Bolivia.svg.png" decoding="async" width="22" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/48/Flag_of_Bolivia.svg/34px-Flag_of_Bolivia.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/48/Flag_of_Bolivia.svg/44px-Flag_of_Bolivia.svg.png 2x" data-file-width="1100" data-file-height="750" /></span></span>&#160;</span><a href="/wiki/Bolivia" title="Bolivia">Bolivia</a></td> <td>52 T </td></tr> <tr> <td>6</td> <td><span class="flagicon"><span class="mw-image-border" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/9e/Flag_of_Japan.svg/23px-Flag_of_Japan.svg.png" decoding="async" width="23" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/9e/Flag_of_Japan.svg/35px-Flag_of_Japan.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/9e/Flag_of_Japan.svg/45px-Flag_of_Japan.svg.png 2x" data-file-width="900" data-file-height="600" /></span></span>&#160;</span><a href="/wiki/Japan" title="Japan">Japan</a></td> <td>45 T </td></tr> <tr> <td>—</td> <td><b>World Total (rounded)</b></td> <td><b>36,400 T</b> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=10" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Mineraly.sk_-_realgar.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Mineraly.sk_-_realgar.jpg/220px-Mineraly.sk_-_realgar.jpg" decoding="async" width="220" height="129" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Mineraly.sk_-_realgar.jpg/330px-Mineraly.sk_-_realgar.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/a/a1/Mineraly.sk_-_realgar.jpg 2x" data-file-width="340" data-file-height="200" /></a><figcaption>Realgar</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Arsenic_symbol.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Arsenic_symbol.svg/80px-Arsenic_symbol.svg.png" decoding="async" width="80" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Arsenic_symbol.svg/120px-Arsenic_symbol.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Arsenic_symbol.svg/160px-Arsenic_symbol.svg.png 2x" data-file-width="16" data-file-height="16" /></a><figcaption><a href="/wiki/Alchemical_symbol" title="Alchemical symbol">Alchemical symbol</a> for arsenic</figcaption></figure> <p>The word <i>arsenic</i> has its origin in the <a href="/wiki/Syriac_language" title="Syriac language">Syriac</a> word <span title="Imperial Aramaic (700-300 BCE)-language text"><span lang="arc" dir="rtl">ܙܪܢܝܟܐ</span></span> <i>zarnika</i>,<sup id="cite_ref-etymonline.com_57-0" class="reference"><a href="#cite_note-etymonline.com-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-oed_&#124;arsenic_58-0" class="reference"><a href="#cite_note-oed_|arsenic-58"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> from Arabic al-zarnīḵ <span title="Arabic-language text"><span lang="ar" dir="rtl">الزرنيخ</span></span> 'the <a href="/wiki/Orpiment" title="Orpiment">orpiment</a>', based on <a href="/wiki/Persian_language" title="Persian language">Persian</a> zar ("gold") from the word <span title="Persian-language text"><span lang="fa" dir="rtl">زرنيخ</span></span> <i>zarnikh</i>, meaning "yellow" (literally "gold-colored") and hence "(yellow) orpiment". It was adopted into <a href="/wiki/Greek_language" title="Greek language">Greek</a> (using <a href="/wiki/Folk_etymology" title="Folk etymology">folk etymology</a>) as <i>arsenikon</i> (<span title="Ancient Greek (to 1453)-language text"><span lang="grc">ἀρσενικόν</span></span>) – a neuter form of the Greek adjective <i>arsenikos</i> (<span title="Ancient Greek (to 1453)-language text"><span lang="grc">ἀρσενικός</span></span>), meaning "male", "virile". </p><p><a href="/wiki/Latin" title="Latin">Latin</a>-speakers adopted the Greek term as <span title="Latin-language text"><i lang="la">arsenicum</i></span>, which in French ultimately became <span title="French-language text"><i lang="fr">arsenic</i></span>, whence the English word "arsenic".<sup id="cite_ref-oed_&#124;arsenic_58-1" class="reference"><a href="#cite_note-oed_|arsenic-58"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> Arsenic sulfides (orpiment, <a href="/wiki/Realgar" title="Realgar">realgar</a>) and oxides have been known and used since ancient times.<sup id="cite_ref-Curiosa_59-0" class="reference"><a href="#cite_note-Curiosa-59"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Zosimos_of_Panopolis" title="Zosimos of Panopolis">Zosimos</a> (<abbr title="circa">c.</abbr><span style="white-space:nowrap;">&#8201;300 AD</span>) describes roasting <i>sandarach</i> (realgar) to obtain <i>cloud of arsenic</i> (<a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">arsenic trioxide</a>), which he then <a href="/wiki/Redox" title="Redox">reduces</a> to gray arsenic.<sup id="cite_ref-60" class="reference"><a href="#cite_note-60"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> As the symptoms of <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">arsenic poisoning</a> are not very specific, the substance was frequently used for murder until the advent in the 1830s of the <a href="/wiki/Marsh_test" title="Marsh test">Marsh test</a>, a sensitive chemical test for its presence. (Another less sensitive but more general test is the <a href="/wiki/Reinsch_test" title="Reinsch test">Reinsch test</a>.) Owing to its use by the ruling class to murder one another and its potency and discreetness, arsenic has been called the "poison of kings" and the "king of poisons".<sup id="cite_ref-61" class="reference"><a href="#cite_note-61"><span class="cite-bracket">&#91;</span>61<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-62" class="reference"><a href="#cite_note-62"><span class="cite-bracket">&#91;</span>62<span class="cite-bracket">&#93;</span></a></sup> Arsenic became known as "the inheritance powder" due to its use in killing family members in the <a href="/wiki/Renaissance_era" class="mw-redirect" title="Renaissance era">Renaissance era</a>.<sup id="cite_ref-63" class="reference"><a href="#cite_note-63"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg/220px-The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg" decoding="async" width="220" height="157" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg/330px-The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/68/The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg/440px-The_Arsenic_Labyrinth_at_Botallack_Mine_-_geograph.org.uk_-_490315.jpg 2x" data-file-width="640" data-file-height="458" /></a><figcaption>The arsenic labyrinth, part of <a href="/wiki/Botallack_Mine" title="Botallack Mine">Botallack Mine</a>, Cornwall</figcaption></figure> <p>During the <a href="/wiki/Bronze_Age" title="Bronze Age">Bronze Age</a>, arsenic was melted with copper to make <a href="/wiki/Arsenical_bronze" title="Arsenical bronze">arsenical bronze</a>.<sup id="cite_ref-64" class="reference"><a href="#cite_note-64"><span class="cite-bracket">&#91;</span>64<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-65" class="reference"><a href="#cite_note-65"><span class="cite-bracket">&#91;</span>65<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Jabir_ibn_Hayyan" title="Jabir ibn Hayyan">Jabir ibn Hayyan</a> described the isolation of arsenic before 815 AD.<sup id="cite_ref-Sarton_66-0" class="reference"><a href="#cite_note-Sarton-66"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Albertus_Magnus" title="Albertus Magnus">Albertus Magnus</a> (Albert the Great, 1193–1280) later isolated the element from a compound in 1250, by heating soap together with <a href="/wiki/Arsenic_trisulfide" title="Arsenic trisulfide">arsenic trisulfide</a>.<sup id="cite_ref-BuildingBlocks451-3_67-0" class="reference"><a href="#cite_note-BuildingBlocks451-3-67"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> In 1649, <a href="/wiki/Johann_Schr%C3%B6der_(physician)" title="Johann Schröder (physician)">Johann Schröder</a> published two ways of preparing arsenic.<sup id="cite_ref-68" class="reference"><a href="#cite_note-68"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup> Crystals of elemental (native) arsenic are found in nature, although rarely. </p><p><a href="/wiki/Cadet%27s_fuming_liquid" title="Cadet&#39;s fuming liquid">Cadet's fuming liquid</a> (impure <a href="/wiki/Cacodyl" title="Cacodyl">cacodyl</a>), often claimed as the first synthetic <a href="/wiki/Organometallic_chemistry" title="Organometallic chemistry">organometallic compound</a>, was synthesized in 1760 by <a href="/wiki/Louis_Claude_Cadet_de_Gassicourt" title="Louis Claude Cadet de Gassicourt">Louis Claude Cadet de Gassicourt</a> through the reaction of <a href="/wiki/Potassium_acetate" title="Potassium acetate">potassium acetate</a> with <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">arsenic trioxide</a>.<sup id="cite_ref-69" class="reference"><a href="#cite_note-69"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg/220px-A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg" decoding="async" width="220" height="287" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg/330px-A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5a/A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg/440px-A_chemist_gives_a_demonstration_involving_arsenic_Wellcome_V0011761.jpg 2x" data-file-width="2377" data-file-height="3099" /></a><figcaption>Satirical cartoon by <a href="/wiki/Honor%C3%A9_Daumier" title="Honoré Daumier">Honoré Daumier</a> of a chemist giving a public demonstration of arsenic, 1841</figcaption></figure> <p>In the <a href="/wiki/Victorian_era" title="Victorian era">Victorian era</a>, women would eat "arsenic" ("<a href="/wiki/White_arsenic" class="mw-redirect" title="White arsenic">white arsenic</a>" or arsenic trioxide) mixed with vinegar and <a href="/wiki/Chalk" title="Chalk">chalk</a> to improve the <a href="/wiki/Complexion" title="Complexion">complexion</a> of their faces, making their skin paler (to show they did not work in the fields).<sup id="cite_ref-70" class="reference"><a href="#cite_note-70"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> The accidental use of arsenic in the adulteration of foodstuffs led to the <a href="/wiki/1858_Bradford_sweets_poisoning" title="1858 Bradford sweets poisoning">Bradford sweet poisoning</a> in 1858, which resulted in 21 deaths.<sup id="cite_ref-Food_71-0" class="reference"><a href="#cite_note-Food-71"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> From the late-18th century wallpaper production began to use dyes made from arsenic,<sup id="cite_ref-72" class="reference"><a href="#cite_note-72"><span class="cite-bracket">&#91;</span>72<span class="cite-bracket">&#93;</span></a></sup> which was thought to increase the pigment's brightness.<sup id="cite_ref-73" class="reference"><a href="#cite_note-73"><span class="cite-bracket">&#91;</span>73<span class="cite-bracket">&#93;</span></a></sup> One account of the illness and <a href="/wiki/Napoleon#Death" title="Napoleon">1821 death</a> of <a href="/wiki/Napoleon_I" class="mw-redirect" title="Napoleon I">Napoleon I</a> implicates arsenic poisoning involving wallpaper.<sup id="cite_ref-74" class="reference"><a href="#cite_note-74"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup> </p><p>Two arsenic pigments have been widely used since their discovery – <a href="/wiki/Paris_Green" class="mw-redirect" title="Paris Green">Paris Green</a> in 1814 and <a href="/wiki/Scheele%27s_Green" class="mw-redirect" title="Scheele&#39;s Green">Scheele's Green</a> in 1775. After the toxicity of arsenic became widely known, these chemicals were used less often as pigments and more often as insecticides. In the 1860s, an arsenic byproduct of dye production, London Purple, was widely used. This was a solid mixture of arsenic trioxide, aniline, lime, and ferrous oxide, insoluble in water and very toxic by inhalation or ingestion<sup id="cite_ref-75" class="reference"><a href="#cite_note-75"><span class="cite-bracket">&#91;</span>75<span class="cite-bracket">&#93;</span></a></sup> But it was later replaced with <a href="/wiki/Paris_Green" class="mw-redirect" title="Paris Green">Paris Green</a>, another arsenic-based dye.<sup id="cite_ref-76" class="reference"><a href="#cite_note-76"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup> With better understanding of the toxicology mechanism, two other compounds were used starting in the 1890s.<sup id="cite_ref-77" class="reference"><a href="#cite_note-77"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Calcium_arsenate" title="Calcium arsenate">Arsenite of lime</a> and <a href="/wiki/Arsenate_of_lead" class="mw-redirect" title="Arsenate of lead">arsenate of lead</a> were used widely as insecticides until the discovery of <a href="/wiki/DDT" title="DDT">DDT</a> in 1942.<sup id="cite_ref-78" class="reference"><a href="#cite_note-78"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-79" class="reference"><a href="#cite_note-79"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-80" class="reference"><a href="#cite_note-80"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup> </p><p>In small doses, soluble arsenic compounds act as <a href="/wiki/Stimulant" title="Stimulant">stimulants</a>, and were once popular as medicine by people in the mid-18th to 19th centuries;<sup id="cite_ref-Holl_23-5" class="reference"><a href="#cite_note-Holl-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-81" class="reference"><a href="#cite_note-81"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-82" class="reference"><a href="#cite_note-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> this use was especially prevalent for sport animals such as <a href="/wiki/Race_horses" class="mw-redirect" title="Race horses">race horses</a> or <a href="/wiki/Work_dog" class="mw-redirect" title="Work dog">work dogs</a> and continued into the 20th century.<sup id="cite_ref-83" class="reference"><a href="#cite_note-83"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> A 2006 study of the remains of the Australian racehorse <a href="/wiki/Phar_Lap" title="Phar Lap">Phar Lap</a> determined that its 1932 death was caused by a massive overdose of arsenic. Sydney veterinarian Percy Sykes stated, "In those days, arsenic was quite a common tonic, usually given in the form of a solution (<a href="/wiki/Fowler%27s_Solution" class="mw-redirect" title="Fowler&#39;s Solution">Fowler's Solution</a>) ... It was so common that I'd reckon 90 per cent of the horses had arsenic in their system."<sup id="cite_ref-84" class="reference"><a href="#cite_note-84"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Applications">Applications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=11" title="Edit section: Applications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Agricultural">Agricultural</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=12" title="Edit section: Agricultural"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Roxarsone.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Roxarsone.png/220px-Roxarsone.png" decoding="async" width="220" height="258" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Roxarsone.png/330px-Roxarsone.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/20/Roxarsone.png/440px-Roxarsone.png 2x" data-file-width="1250" data-file-height="1468" /></a><figcaption><a href="/wiki/Roxarsone" title="Roxarsone">Roxarsone</a> is a controversial arsenic compound used as a feed ingredient for chickens.</figcaption></figure> <p>The toxicity of arsenic to insects, bacteria, and fungi led to its use as a <a href="/wiki/Wood_preservative" class="mw-redirect" title="Wood preservative">wood preservative</a>.<sup id="cite_ref-85" class="reference"><a href="#cite_note-85"><span class="cite-bracket">&#91;</span>85<span class="cite-bracket">&#93;</span></a></sup> In the 1930s, a process of treating wood with <a href="/wiki/Chromated_copper_arsenate" title="Chromated copper arsenate">chromated copper arsenate</a> (also known as CCA or <a href="/wiki/Tanalith" class="mw-redirect" title="Tanalith">Tanalith</a>) was invented, and for decades, this treatment was the most extensive industrial use of arsenic. An increased appreciation of the toxicity of arsenic led to a ban of CCA in consumer products in 2004, initiated by the European Union and United States.<sup id="cite_ref-86" class="reference"><a href="#cite_note-86"><span class="cite-bracket">&#91;</span>86<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-round_87-0" class="reference"><a href="#cite_note-round-87"><span class="cite-bracket">&#91;</span>87<span class="cite-bracket">&#93;</span></a></sup> However, CCA remains in heavy use in other countries (such as on Malaysian rubber plantations).<sup id="cite_ref-Ullmann_15-1" class="reference"><a href="#cite_note-Ullmann-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic was also used in various agricultural insecticides and poisons. For example, <a href="/wiki/Lead_hydrogen_arsenate" title="Lead hydrogen arsenate">lead hydrogen arsenate</a> was a common insecticide on <a href="/wiki/Fruit_tree" title="Fruit tree">fruit trees</a>,<sup id="cite_ref-88" class="reference"><a href="#cite_note-88"><span class="cite-bracket">&#91;</span>88<span class="cite-bracket">&#93;</span></a></sup> but contact with the compound sometimes resulted in brain damage among those working the sprayers. In the second half of the 20th century, <a href="/wiki/Monosodium_methyl_arsenate" class="mw-redirect" title="Monosodium methyl arsenate">monosodium methyl arsenate</a> (MSMA) and <a href="/wiki/Disodium_methyl_arsenate" class="mw-redirect" title="Disodium methyl arsenate">disodium methyl arsenate</a> (DSMA) – less toxic organic forms of arsenic – replaced lead arsenate in agriculture. These organic arsenicals were in turn phased out in the United States by 2013 in all agricultural activities except cotton farming.<sup id="cite_ref-Federal_Register_89-0" class="reference"><a href="#cite_note-Federal_Register-89"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-90" class="reference"><a href="#cite_note-90"><span class="cite-bracket">&#91;</span>90<span class="cite-bracket">&#93;</span></a></sup> </p><p>The biogeochemistry of arsenic is complex and includes various adsorption and desorption processes. The toxicity of arsenic is connected to its solubility and is affected by pH. Arsenite (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">AsO<span class="template-chem2-su"><span>3−</span><span>3</span></span></span>) is more soluble than arsenate (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">AsO<span class="template-chem2-su"><span>3−</span><span>4</span></span></span>) and is more toxic; however, at a lower pH, arsenate becomes more mobile and toxic. It was found that addition of sulfur, phosphorus, and iron oxides to high-arsenite soils greatly reduces arsenic phytotoxicity.<sup id="cite_ref-91" class="reference"><a href="#cite_note-91"><span class="cite-bracket">&#91;</span>91<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic is used as a feed additive in <a href="/wiki/Poultry_farming" title="Poultry farming">poultry</a> and <a href="/wiki/Pig_farming" title="Pig farming">swine production</a>, in particular it was used in the U.S. until 2015 to increase weight gain, improve <a href="/wiki/Feed_conversion_ratio" title="Feed conversion ratio">feed efficiency</a>, and prevent disease.<sup id="cite_ref-92" class="reference"><a href="#cite_note-92"><span class="cite-bracket">&#91;</span>92<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-93" class="reference"><a href="#cite_note-93"><span class="cite-bracket">&#91;</span>93<span class="cite-bracket">&#93;</span></a></sup> An example is <a href="/wiki/Roxarsone" title="Roxarsone">roxarsone</a>, which had been used as a <a href="/wiki/Broiler" title="Broiler">broiler</a> starter by about 70% of U.S. broiler growers.<sup id="cite_ref-94" class="reference"><a href="#cite_note-94"><span class="cite-bracket">&#91;</span>94<span class="cite-bracket">&#93;</span></a></sup> In 2011, Alpharma, a subsidiary of Pfizer Inc., which produces roxarsone, voluntarily suspended sales of the drug in response to studies showing elevated levels of inorganic arsenic, a carcinogen, in treated chickens.<sup id="cite_ref-FDAQ&amp;A_95-0" class="reference"><a href="#cite_note-FDAQ&amp;A-95"><span class="cite-bracket">&#91;</span>95<span class="cite-bracket">&#93;</span></a></sup> A successor to Alpharma, <a href="/wiki/Zoetis" title="Zoetis">Zoetis</a>, continued to sell <a href="/wiki/Nitarsone" title="Nitarsone">nitarsone</a> until 2015, primarily for use in turkeys.<sup id="cite_ref-FDAQ&amp;A_95-1" class="reference"><a href="#cite_note-FDAQ&amp;A-95"><span class="cite-bracket">&#91;</span>95<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Medical_use">Medical use</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=13" title="Edit section: Medical use"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>During the 17th, 18th, and 19th centuries, a number of arsenic compounds were used as medicines, including <a href="/wiki/Arsphenamine" title="Arsphenamine">arsphenamine</a> (by <a href="/wiki/Paul_Ehrlich" title="Paul Ehrlich">Paul Ehrlich</a>) and <a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">arsenic trioxide</a> (by <a href="/wiki/Thomas_Fowler_(inventor)" title="Thomas Fowler (inventor)">Thomas Fowler</a>), for treating diseases such as cancer or <a href="/wiki/Psoriasis" title="Psoriasis">psoriasis</a>.<sup id="cite_ref-ITOM_96-0" class="reference"><a href="#cite_note-ITOM-96"><span class="cite-bracket">&#91;</span>96<span class="cite-bracket">&#93;</span></a></sup> Arsphenamine, as well as <a href="/wiki/Neosalvarsan" title="Neosalvarsan">neosalvarsan</a>, was indicated for <a href="/wiki/Syphilis" title="Syphilis">syphilis</a>, but has been superseded by modern <a href="/wiki/Antibiotics" class="mw-redirect" title="Antibiotics">antibiotics</a>. However, arsenicals such as <a href="/wiki/Melarsoprol" title="Melarsoprol">melarsoprol</a> are still used for the treatment of <a href="/wiki/Trypanosomiasis" title="Trypanosomiasis">trypanosomiasis</a> in spite of their severe toxicity, since the disease is almost uniformly fatal if untreated.<sup id="cite_ref-97" class="reference"><a href="#cite_note-97"><span class="cite-bracket">&#91;</span>97<span class="cite-bracket">&#93;</span></a></sup> In 2000 the US <a href="/wiki/Food_and_Drug_Administration" title="Food and Drug Administration">Food and Drug Administration</a> approved arsenic trioxide for the treatment of patients with <a href="/wiki/Acute_promyelocytic_leukemia" title="Acute promyelocytic leukemia">acute promyelocytic leukemia</a> that is resistant to <a href="/wiki/All-trans_retinoic_acid" class="mw-redirect" title="All-trans retinoic acid">all-trans retinoic acid</a>.<sup id="cite_ref-98" class="reference"><a href="#cite_note-98"><span class="cite-bracket">&#91;</span>98<span class="cite-bracket">&#93;</span></a></sup> </p><p>A 2008 paper reports success in locating tumors using arsenic-74 (a positron emitter). This isotope produces clearer <a href="/wiki/Positron_emission_tomography" title="Positron emission tomography">PET scan</a> images than the previous radioactive agent, <a href="/wiki/Iodine" title="Iodine">iodine</a>-124, because the body tends to transport iodine to the thyroid gland producing signal noise.<sup id="cite_ref-99" class="reference"><a href="#cite_note-99"><span class="cite-bracket">&#91;</span>99<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Nanoparticle" title="Nanoparticle">Nanoparticles</a> of arsenic have shown ability to kill cancer cells with lesser <a href="/wiki/Cytotoxicity" title="Cytotoxicity">cytotoxicity</a> than other arsenic formulations.<sup id="cite_ref-100" class="reference"><a href="#cite_note-100"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Alloys_2">Alloys</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=14" title="Edit section: Alloys"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The main use of arsenic is in alloying with lead. Lead components in <a href="/wiki/Automotive_battery" title="Automotive battery">car batteries</a> are strengthened by the presence of a very small percentage of arsenic.<sup id="cite_ref-Ullmann_15-2" class="reference"><a href="#cite_note-Ullmann-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-101" class="reference"><a href="#cite_note-101"><span class="cite-bracket">&#91;</span>101<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Selective_leaching" title="Selective leaching">Dezincification</a> of <a href="/wiki/Brass" title="Brass">brass</a> (a copper-zinc alloy) is greatly reduced by the addition of arsenic.<sup id="cite_ref-102" class="reference"><a href="#cite_note-102"><span class="cite-bracket">&#91;</span>102<span class="cite-bracket">&#93;</span></a></sup> "Phosphorus Deoxidized Arsenical Copper" with an arsenic content of 0.3% has an increased corrosion stability in certain environments.<sup id="cite_ref-103" class="reference"><a href="#cite_note-103"><span class="cite-bracket">&#91;</span>103<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Gallium_arsenide" title="Gallium arsenide">Gallium arsenide</a> is an important <a href="/wiki/Semiconductor" title="Semiconductor">semiconductor</a> material, used in <a href="/wiki/Integrated_circuit" title="Integrated circuit">integrated circuits</a>. Circuits made from GaAs are much faster (but also much more expensive) than those made from <a href="/wiki/Silicon" title="Silicon">silicon</a>. Unlike silicon, GaAs has a <a href="/wiki/Direct_bandgap" class="mw-redirect" title="Direct bandgap">direct bandgap</a>, and can be used in <a href="/wiki/Laser_diode" title="Laser diode">laser diodes</a> and <a href="/wiki/LED" class="mw-redirect" title="LED">LEDs</a> to convert electrical energy directly into light.<sup id="cite_ref-Ullmann_15-3" class="reference"><a href="#cite_note-Ullmann-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Military">Military</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=15" title="Edit section: Military"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>After <a href="/wiki/World_War_I" title="World War I">World War I</a>, the United States built a stockpile of 20,000 tons of <a href="/wiki/Chemical_warfare" title="Chemical warfare">weaponized</a> <a href="/wiki/Lewisite" title="Lewisite">lewisite</a> (ClCH=CHAsCl<sub>2</sub>), an <a href="/wiki/Organoarsenic" class="mw-redirect" title="Organoarsenic">organoarsenic</a> <a href="/wiki/Vesicant" class="mw-redirect" title="Vesicant">vesicant</a> (blister agent) and <a href="/wiki/Lung" title="Lung">lung</a> irritant. The stockpile was neutralized with <a href="/wiki/Sodium_hypochlorite" title="Sodium hypochlorite">bleach</a> and dumped into the <a href="/wiki/Gulf_of_Mexico" title="Gulf of Mexico">Gulf of Mexico</a> in the 1950s.<sup id="cite_ref-104" class="reference"><a href="#cite_note-104"><span class="cite-bracket">&#91;</span>104<span class="cite-bracket">&#93;</span></a></sup> During the <a href="/wiki/Vietnam_War" title="Vietnam War">Vietnam War</a>, the United States used <a href="/wiki/Agent_Blue" title="Agent Blue">Agent Blue</a>, a mixture of <a href="/wiki/Sodium_cacodylate" class="mw-redirect" title="Sodium cacodylate">sodium cacodylate</a> and its acid form, as one of the <a href="/wiki/Rainbow_herbicides" class="mw-redirect" title="Rainbow herbicides">rainbow herbicides</a> to deprive North Vietnamese soldiers of foliage cover and rice.<sup id="cite_ref-105" class="reference"><a href="#cite_note-105"><span class="cite-bracket">&#91;</span>105<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-106" class="reference"><a href="#cite_note-106"><span class="cite-bracket">&#91;</span>106<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Other_uses">Other uses</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=16" title="Edit section: Other uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Copper acetoarsenite was used as a green <a href="/wiki/Pigment" title="Pigment">pigment</a> known under many names, including <a href="/wiki/Paris_Green" class="mw-redirect" title="Paris Green">Paris Green</a> and Emerald Green. It caused numerous <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">arsenic poisonings</a>. <a href="/wiki/Scheele%27s_Green" class="mw-redirect" title="Scheele&#39;s Green">Scheele's Green</a>, a copper arsenate, was used in the 19th century as a <a href="/wiki/Food_dye" class="mw-redirect" title="Food dye">coloring agent</a> in <a href="/wiki/Sweets" class="mw-redirect" title="Sweets">sweets</a>.<sup id="cite_ref-107" class="reference"><a href="#cite_note-107"><span class="cite-bracket">&#91;</span>107<span class="cite-bracket">&#93;</span></a></sup></li> <li>Arsenic is used in <a href="/wiki/Bronzing" title="Bronzing">bronzing</a>.<sup id="cite_ref-108" class="reference"><a href="#cite_note-108"><span class="cite-bracket">&#91;</span>108<span class="cite-bracket">&#93;</span></a></sup></li> <li>As much as 2% of produced arsenic is used in lead alloys for <a href="/wiki/Lead_shot" class="mw-redirect" title="Lead shot">lead shot</a> and bullets.<sup id="cite_ref-109" class="reference"><a href="#cite_note-109"><span class="cite-bracket">&#91;</span>109<span class="cite-bracket">&#93;</span></a></sup></li> <li>Arsenic is added in small quantities to alpha-brass to make it <a href="/wiki/Selective_leaching" title="Selective leaching">dezincification-resistant</a>. This grade of brass is used in plumbing fittings and other wet environments.<sup id="cite_ref-110" class="reference"><a href="#cite_note-110"><span class="cite-bracket">&#91;</span>110<span class="cite-bracket">&#93;</span></a></sup></li> <li>Arsenic is also used for <a href="/wiki/Taxonomy" title="Taxonomy">taxonomic</a> sample preservation. It was also used in embalming fluids historically.<sup id="cite_ref-111" class="reference"><a href="#cite_note-111"><span class="cite-bracket">&#91;</span>111<span class="cite-bracket">&#93;</span></a></sup></li> <li>Arsenic was used in the <a href="/wiki/Taxidermy" title="Taxidermy">taxidermy</a> process up until the 1980s.<sup id="cite_ref-112" class="reference"><a href="#cite_note-112"><span class="cite-bracket">&#91;</span>112<span class="cite-bracket">&#93;</span></a></sup></li> <li>Arsenic was used as an opacifier in ceramics, creating white glazes.<sup id="cite_ref-113" class="reference"><a href="#cite_note-113"><span class="cite-bracket">&#91;</span>113<span class="cite-bracket">&#93;</span></a></sup></li> <li>Until recently, arsenic was used in optical glass. Modern glass manufacturers have ceased using both arsenic and lead.<sup id="cite_ref-114" class="reference"><a href="#cite_note-114"><span class="cite-bracket">&#91;</span>114<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-115" class="reference"><a href="#cite_note-115"><span class="cite-bracket">&#91;</span>115<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-116" class="reference"><a href="#cite_note-116"><span class="cite-bracket">&#91;</span>116<span class="cite-bracket">&#93;</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Biological_role">Biological role</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=17" title="Edit section: Biological role"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Arsenic_biochemistry" title="Arsenic biochemistry">Arsenic biochemistry</a></div> <div class="mw-heading mw-heading3"><h3 id="Bacteria">Bacteria</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=18" title="Edit section: Bacteria"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some species of bacteria obtain their energy in the absence of oxygen by <a href="/wiki/Redox" title="Redox">oxidizing</a> various fuels while <a href="/wiki/Redox" title="Redox">reducing</a> arsenate to arsenite. Under oxidative environmental conditions some bacteria use arsenite as fuel, which they oxidize to arsenate.<sup id="cite_ref-117" class="reference"><a href="#cite_note-117"><span class="cite-bracket">&#91;</span>117<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/Enzyme" title="Enzyme">enzymes</a> involved are known as <a href="/wiki/Arsenate_reductase_(glutaredoxin)" title="Arsenate reductase (glutaredoxin)">arsenate reductases</a> (Arr).<sup id="cite_ref-118" class="reference"><a href="#cite_note-118"><span class="cite-bracket">&#91;</span>118<span class="cite-bracket">&#93;</span></a></sup> </p><p>In 2008, bacteria were discovered that employ a version of <a href="/wiki/Photosynthesis" title="Photosynthesis">photosynthesis</a> in the absence of oxygen with arsenites as <a href="/wiki/Electron_donor" title="Electron donor">electron donors</a>, producing arsenates (just as ordinary photosynthesis uses water as electron donor, producing molecular oxygen). Researchers conjecture that, over the course of history, these photosynthesizing organisms produced the arsenates that allowed the arsenate-reducing bacteria to thrive. One <a href="/wiki/Strain_(biology)" title="Strain (biology)">strain</a>, PHS-1, has been isolated and is related to the <a href="/wiki/Gammaproteobacterium" class="mw-redirect" title="Gammaproteobacterium">gammaproteobacterium</a> <i><a href="/wiki/Ectothiorhodospira_shaposhnikovii" class="mw-redirect" title="Ectothiorhodospira shaposhnikovii">Ectothiorhodospira shaposhnikovii</a></i>. The mechanism is unknown, but an encoded Arr enzyme may function in reverse to its known <a href="/wiki/Homology_(biology)" title="Homology (biology)">homologues</a>.<sup id="cite_ref-119" class="reference"><a href="#cite_note-119"><span class="cite-bracket">&#91;</span>119<span class="cite-bracket">&#93;</span></a></sup> </p><p>In 2011, it was postulated that the <i><a href="/wiki/Halomonadaceae" title="Halomonadaceae">Halomonadaceae</a></i> strain <a href="/wiki/GFAJ-1" title="GFAJ-1">GFAJ-1</a> could be grown in the absence of phosphorus if that element were substituted with arsenic,<sup id="cite_ref-120" class="reference"><a href="#cite_note-120"><span class="cite-bracket">&#91;</span>120<span class="cite-bracket">&#93;</span></a></sup> exploiting the fact that the <a href="/wiki/Arsenate" title="Arsenate">arsenate</a> and <a href="/wiki/Phosphate" title="Phosphate">phosphate</a> anions are similar structurally. The study was widely criticised and subsequently refuted by independent researcher groups.<sup id="cite_ref-121" class="reference"><a href="#cite_note-121"><span class="cite-bracket">&#91;</span>121<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-122" class="reference"><a href="#cite_note-122"><span class="cite-bracket">&#91;</span>122<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Potential_role_in_higher_animals">Potential role in higher animals</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=19" title="Edit section: Potential role in higher animals"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic may be an essential trace mineral in birds, involved in the synthesis of methionine metabolites.<sup id="cite_ref-123" class="reference"><a href="#cite_note-123"><span class="cite-bracket">&#91;</span>123<span class="cite-bracket">&#93;</span></a></sup> However, the role of arsenic in bird nutrition is disputed, as other authors state that arsenic is toxic in small amounts.<sup id="cite_ref-124" class="reference"><a href="#cite_note-124"><span class="cite-bracket">&#91;</span>124<span class="cite-bracket">&#93;</span></a></sup> </p><p>Some evidence indicates that arsenic is an essential trace mineral in mammals.<sup id="cite_ref-ANut_17-1" class="reference"><a href="#cite_note-ANut-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-UEssent_18-1" class="reference"><a href="#cite_note-UEssent-18"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Heredity">Heredity</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=20" title="Edit section: Heredity"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic has been linked to <a href="/wiki/Epigenetics" title="Epigenetics">epigenetic changes</a>, heritable changes in gene expression that occur without changes in <a href="/wiki/DNA_sequence" class="mw-redirect" title="DNA sequence">DNA sequence</a>. These include DNA methylation, histone modification, and <a href="/wiki/RNA" title="RNA">RNA</a> interference. Toxic levels of arsenic cause significant DNA hypermethylation of tumor suppressor genes <a href="/wiki/P16_(gene)" class="mw-redirect" title="P16 (gene)">p16</a> and <a href="/wiki/P53" title="P53">p53</a>, thus increasing risk of <a href="/wiki/Carcinogenesis" title="Carcinogenesis">carcinogenesis</a>. These epigenetic events have been studied <i>in vitro</i> using human <a href="/wiki/Kidney" title="Kidney">kidney</a> cells and <i>in vivo</i> using rat <a href="/wiki/Liver" title="Liver">liver</a> cells and peripheral blood <a href="/wiki/Leukocytes" class="mw-redirect" title="Leukocytes">leukocytes</a> in humans.<sup id="cite_ref-125" class="reference"><a href="#cite_note-125"><span class="cite-bracket">&#91;</span>125<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Inductively_coupled_plasma_mass_spectrometry" title="Inductively coupled plasma mass spectrometry">Inductively coupled plasma mass spectrometry</a> (ICP-MS) is used to detect precise levels of intracellular arsenic and other arsenic bases involved in epigenetic modification of DNA.<sup id="cite_ref-126" class="reference"><a href="#cite_note-126"><span class="cite-bracket">&#91;</span>126<span class="cite-bracket">&#93;</span></a></sup> Studies investigating arsenic as an epigenetic factor can be used to develop precise biomarkers of exposure and susceptibility. </p><p>The Chinese brake fern (<i><a href="/wiki/Pteris_vittata" title="Pteris vittata">Pteris vittata</a></i>) hyperaccumulates arsenic from the soil into its leaves and has a proposed use in <a href="/wiki/Phytoremediation" title="Phytoremediation">phytoremediation</a>.<sup id="cite_ref-127" class="reference"><a href="#cite_note-127"><span class="cite-bracket">&#91;</span>127<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Biomethylation">Biomethylation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=21" title="Edit section: Biomethylation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:ArsenobetainePIC.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/ArsenobetainePIC.svg/220px-ArsenobetainePIC.svg.png" decoding="async" width="220" height="138" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/ArsenobetainePIC.svg/330px-ArsenobetainePIC.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a3/ArsenobetainePIC.svg/440px-ArsenobetainePIC.svg.png 2x" data-file-width="124" data-file-height="78" /></a><figcaption><a href="/wiki/Arsenobetaine" title="Arsenobetaine">Arsenobetaine</a></figcaption></figure> <p>Inorganic arsenic and its compounds, upon entering the <a href="/wiki/Food_chain" title="Food chain">food chain</a>, are progressively metabolized through a process of <a href="/wiki/Methylation" title="Methylation">methylation</a>.<sup id="cite_ref-Biomethylation_128-0" class="reference"><a href="#cite_note-Biomethylation-128"><span class="cite-bracket">&#91;</span>128<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-129" class="reference"><a href="#cite_note-129"><span class="cite-bracket">&#91;</span>129<span class="cite-bracket">&#93;</span></a></sup> For example, the mold <i><a href="/wiki/Scopulariopsis_brevicaulis" class="mw-redirect" title="Scopulariopsis brevicaulis">Scopulariopsis brevicaulis</a></i> produces <a href="/wiki/Trimethylarsine" title="Trimethylarsine">trimethylarsine</a> if inorganic arsenic is present.<sup id="cite_ref-130" class="reference"><a href="#cite_note-130"><span class="cite-bracket">&#91;</span>130<span class="cite-bracket">&#93;</span></a></sup> The organic compound <a href="/wiki/Arsenobetaine" title="Arsenobetaine">arsenobetaine</a> is found in some marine foods such as fish and algae, and also in mushrooms in larger concentrations. The average person's intake is about 10–50&#160;μg/day. Values about 1000&#160;μg are not unusual following consumption of fish or mushrooms, but there is little danger in eating fish because this arsenic compound is nearly non-toxic.<sup id="cite_ref-131" class="reference"><a href="#cite_note-131"><span class="cite-bracket">&#91;</span>131<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Environmental_issues">Environmental issues</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=22" title="Edit section: Environmental issues"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Exposure">Exposure</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=23" title="Edit section: Exposure"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naturally occurring sources of human exposure include <a href="/wiki/Volcanic_ash" title="Volcanic ash">volcanic ash</a>, weathering of minerals and ores, and mineralized groundwater. Arsenic is also found in food, water, soil, and air.<sup id="cite_ref-132" class="reference"><a href="#cite_note-132"><span class="cite-bracket">&#91;</span>132<span class="cite-bracket">&#93;</span></a></sup> Arsenic is absorbed by all plants, but is more concentrated in leafy vegetables, rice, apple and grape juice, and seafood.<sup id="cite_ref-133" class="reference"><a href="#cite_note-133"><span class="cite-bracket">&#91;</span>133<span class="cite-bracket">&#93;</span></a></sup> An additional route of exposure is inhalation of atmospheric gases and dusts.<sup id="cite_ref-atsdr.cdc.gov_134-0" class="reference"><a href="#cite_note-atsdr.cdc.gov-134"><span class="cite-bracket">&#91;</span>134<span class="cite-bracket">&#93;</span></a></sup> During the <a href="/wiki/Victorian_era" title="Victorian era">Victorian era</a>, arsenic was widely used in home decor, especially wallpapers.<sup id="cite_ref-135" class="reference"><a href="#cite_note-135"><span class="cite-bracket">&#91;</span>135<span class="cite-bracket">&#93;</span></a></sup> In Europe, an analysis based on 20,000 soil samples across all 28 countries show that 98% of sampled soils have concentrations less than 20 mg kg-1. In addition, the As hotspots are related to frequent fertilization and close distance to mining activities.<sup id="cite_ref-136" class="reference"><a href="#cite_note-136"><span class="cite-bracket">&#91;</span>136<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Occurrence_in_drinking_water">Occurrence in drinking water</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=24" title="Edit section: Occurrence in drinking water"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Arsenic_contamination_of_groundwater" title="Arsenic contamination of groundwater">Arsenic contamination of groundwater</a></div> <p>Extensive arsenic contamination of groundwater has led to widespread <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">arsenic poisoning</a> in <a href="/wiki/Water_supply_and_sanitation_in_Bangladesh" title="Water supply and sanitation in Bangladesh">Bangladesh</a><sup id="cite_ref-137" class="reference"><a href="#cite_note-137"><span class="cite-bracket">&#91;</span>137<span class="cite-bracket">&#93;</span></a></sup> and neighboring countries. It is estimated that approximately 57&#160;million people in the Bengal basin are drinking <a href="/wiki/Groundwater" title="Groundwater">groundwater</a> with arsenic concentrations elevated above the <a href="/wiki/World_Health_Organization" title="World Health Organization">World Health Organization</a>'s standard of 10 <a href="/wiki/Concentration#&quot;Parts-per&quot;_notation" title="Concentration">parts per billion</a> (ppb).<sup id="cite_ref-138" class="reference"><a href="#cite_note-138"><span class="cite-bracket">&#91;</span>138<span class="cite-bracket">&#93;</span></a></sup> However, a study of cancer rates in <a href="/wiki/Taiwan" title="Taiwan">Taiwan</a><sup id="cite_ref-139" class="reference"><a href="#cite_note-139"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> suggested that significant increases in cancer mortality appear only at levels above 150&#160;ppb. The arsenic in the groundwater is of natural origin, and is released from the sediment into the groundwater, caused by the <a href="/wiki/Dead_zone_(ecology)" title="Dead zone (ecology)">anoxic conditions</a> of the subsurface. This groundwater was used after local and western <a href="/wiki/Non-governmental_organization" title="Non-governmental organization">NGOs</a> and the Bangladeshi government undertook a massive shallow tube <a href="/wiki/Water_well" class="mw-redirect" title="Water well">well</a> drinking-water program in the late twentieth century. This program was designed to prevent drinking of bacteria-contaminated surface waters, but failed to test for arsenic in the groundwater. Many other countries and districts in Southeast Asia, such as <a href="/wiki/Vietnam" title="Vietnam">Vietnam</a> and <a href="/wiki/Cambodia" title="Cambodia">Cambodia</a>, have geological environments that produce groundwater with a high arsenic content. <a href="/wiki/Arsenic_poisoning#Arsenicosis:_chronic_arsenic_poisoning_from_drinking_water" title="Arsenic poisoning">Arsenicosis</a> was reported in <a href="/wiki/Nakhon_Si_Thammarat" title="Nakhon Si Thammarat">Nakhon Si Thammarat</a>, Thailand, in 1987, and the <a href="/wiki/Chao_Phraya_River" title="Chao Phraya River">Chao Phraya River</a> probably contains high levels of naturally occurring dissolved arsenic without being a public health problem because much of the public uses <a href="/wiki/Bottled_water" title="Bottled water">bottled water</a>.<sup id="cite_ref-140" class="reference"><a href="#cite_note-140"><span class="cite-bracket">&#91;</span>140<span class="cite-bracket">&#93;</span></a></sup> In Pakistan, more than 60&#160;million people are exposed to arsenic polluted drinking water indicated by a 2017 report in <a href="/wiki/Science_(journal)" title="Science (journal)"><i>Science</i></a>. Podgorski's team investigated more than 1200 samples and more than 66% exceeded the WHO minimum contamination level.<sup id="cite_ref-141" class="reference"><a href="#cite_note-141"><span class="cite-bracket">&#91;</span>141<span class="cite-bracket">&#93;</span></a></sup> </p><p>Since the 1980s, residents of the Ba Men region of Inner Mongolia, China have been chronically exposed to arsenic through drinking water from contaminated wells.<sup id="cite_ref-Well_Water_Arsenic_Exposure,_Arsenic_Induced_Skin-Lesions_and_Self-Reported_Morbidity_in_Inner_Mongolia_142-0" class="reference"><a href="#cite_note-Well_Water_Arsenic_Exposure,_Arsenic_Induced_Skin-Lesions_and_Self-Reported_Morbidity_in_Inner_Mongolia-142"><span class="cite-bracket">&#91;</span>142<span class="cite-bracket">&#93;</span></a></sup> A 2009 research study observed an elevated presence of skin lesions among residents with well water arsenic concentrations between 5 and 10&#160;μg/L, suggesting that arsenic induced toxicity may occur at relatively low concentrations with chronic exposure.<sup id="cite_ref-Well_Water_Arsenic_Exposure,_Arsenic_Induced_Skin-Lesions_and_Self-Reported_Morbidity_in_Inner_Mongolia_142-1" class="reference"><a href="#cite_note-Well_Water_Arsenic_Exposure,_Arsenic_Induced_Skin-Lesions_and_Self-Reported_Morbidity_in_Inner_Mongolia-142"><span class="cite-bracket">&#91;</span>142<span class="cite-bracket">&#93;</span></a></sup> Overall, 20 of China's 34 provinces have high arsenic concentrations in the groundwater supply, potentially exposing 19&#160;million people to hazardous drinking water.<sup id="cite_ref-Lall_143-0" class="reference"><a href="#cite_note-Lall-143"><span class="cite-bracket">&#91;</span>143<span class="cite-bracket">&#93;</span></a></sup> </p><p>A study by <a href="/wiki/IIT_Kharagpur" title="IIT Kharagpur">IIT Kharagpur</a> found high levels of Arsenic in groundwater of 20% of India's land, exposing more than 250&#160;million people. States such as <a href="/wiki/Punjab" title="Punjab">Punjab</a>, Bihar, <a href="/wiki/West_Bengal" title="West Bengal">West Bengal</a>, Assam, <a href="/wiki/Haryana" title="Haryana">Haryana</a>, Uttar Pradesh, and <a href="/wiki/Gujarat" title="Gujarat">Gujarat</a> have highest land area exposed to arsenic.<sup id="cite_ref-144" class="reference"><a href="#cite_note-144"><span class="cite-bracket">&#91;</span>144<span class="cite-bracket">&#93;</span></a></sup> </p><p>In the United States, arsenic is most commonly found in the ground waters of the southwest.<sup id="cite_ref-test_145-0" class="reference"><a href="#cite_note-test-145"><span class="cite-bracket">&#91;</span>145<span class="cite-bracket">&#93;</span></a></sup> Parts of <a href="/wiki/New_England" title="New England">New England</a>, <a href="/wiki/Michigan" title="Michigan">Michigan</a>, <a href="/wiki/Wisconsin" title="Wisconsin">Wisconsin</a>, <a href="/wiki/Minnesota" title="Minnesota">Minnesota</a> and the Dakotas are also known to have significant concentrations of arsenic in ground water.<sup id="cite_ref-146" class="reference"><a href="#cite_note-146"><span class="cite-bracket">&#91;</span>146<span class="cite-bracket">&#93;</span></a></sup> Increased levels of skin cancer have been associated with arsenic exposure in Wisconsin, even at levels below the 10&#160;ppb drinking water standard.<sup id="cite_ref-147" class="reference"><a href="#cite_note-147"><span class="cite-bracket">&#91;</span>147<span class="cite-bracket">&#93;</span></a></sup> According to a recent film funded by the US <a href="/wiki/Superfund" title="Superfund">Superfund</a>, millions of private wells have unknown arsenic levels, and in some areas of the US, more than 20% of the wells may contain levels that exceed established limits.<sup id="cite_ref-148" class="reference"><a href="#cite_note-148"><span class="cite-bracket">&#91;</span>148<span class="cite-bracket">&#93;</span></a></sup> </p><p>Low-level exposure to arsenic at concentrations of 100&#160;ppb (i.e., above the 10&#160;ppb drinking water standard) compromises the initial immune response to <a href="/wiki/Influenza_A_virus_subtype_H1N1" title="Influenza A virus subtype H1N1">H1N1 or swine flu</a> infection according to NIEHS-supported scientists. The study, conducted in laboratory mice, suggests that people exposed to arsenic in their drinking water may be at increased risk for more serious illness or death from the virus.<sup id="cite_ref-149" class="reference"><a href="#cite_note-149"><span class="cite-bracket">&#91;</span>149<span class="cite-bracket">&#93;</span></a></sup> </p><p>Some Canadians are drinking water that contains inorganic arsenic. Private-dug–well waters are most at risk for containing inorganic arsenic. Preliminary well water analysis typically does not test for arsenic. Researchers at the Geological Survey of Canada have modeled relative variation in natural arsenic hazard potential for the province of New Brunswick. This study has important implications for potable water and health concerns relating to inorganic arsenic.<sup id="cite_ref-GSC-2009_150-0" class="reference"><a href="#cite_note-GSC-2009-150"><span class="cite-bracket">&#91;</span>150<span class="cite-bracket">&#93;</span></a></sup> </p><p>Epidemiological evidence from Chile shows a dose-dependent connection between chronic arsenic exposure and various forms of cancer, in particular when other risk factors, such as cigarette smoking, are present. These effects have been demonstrated at contaminations less than 50&#160;ppb.<sup id="cite_ref-151" class="reference"><a href="#cite_note-151"><span class="cite-bracket">&#91;</span>151<span class="cite-bracket">&#93;</span></a></sup> Arsenic is itself a constituent of <a href="/wiki/Tobacco_smoke" title="Tobacco smoke">tobacco smoke</a>.<sup id="cite_ref-TalhoutSchulz2011_152-0" class="reference"><a href="#cite_note-TalhoutSchulz2011-152"><span class="cite-bracket">&#91;</span>152<span class="cite-bracket">&#93;</span></a></sup> </p><p>Analyzing multiple epidemiological studies on inorganic arsenic exposure suggests a small but measurable increase in risk for bladder cancer at 10&#160;ppb.<sup id="cite_ref-153" class="reference"><a href="#cite_note-153"><span class="cite-bracket">&#91;</span>153<span class="cite-bracket">&#93;</span></a></sup> According to Peter Ravenscroft of the Department of Geography at the University of Cambridge,<sup id="cite_ref-154" class="reference"><a href="#cite_note-154"><span class="cite-bracket">&#91;</span>154<span class="cite-bracket">&#93;</span></a></sup> roughly 80&#160;million people worldwide consume between 10 and 50&#160;ppb arsenic in their drinking water. If they all consumed exactly 10&#160;ppb arsenic in their drinking water, the previously cited multiple epidemiological study analysis would predict an additional 2,000 cases of bladder cancer alone. This represents a clear underestimate of the overall impact, since it does not include lung or skin cancer, and explicitly underestimates the exposure. Those exposed to levels of arsenic above the current WHO standard should weigh the costs and benefits of arsenic remediation. </p><p>Early (1973) evaluations of the processes for removing dissolved arsenic from drinking water demonstrated the efficacy of co-precipitation with either iron or aluminium oxides. In particular, iron as a coagulant was found to remove arsenic with an efficacy exceeding 90%.<sup id="cite_ref-155" class="reference"><a href="#cite_note-155"><span class="cite-bracket">&#91;</span>155<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-156" class="reference"><a href="#cite_note-156"><span class="cite-bracket">&#91;</span>156<span class="cite-bracket">&#93;</span></a></sup> Several adsorptive media systems have been approved for use at point-of-service in a study funded by the <a href="/wiki/United_States_Environmental_Protection_Agency" title="United States Environmental Protection Agency">United States Environmental Protection Agency</a> (US EPA) and the <a href="/wiki/National_Science_Foundation" title="National Science Foundation">National Science Foundation</a> (NSF). A team of European and Indian scientists and engineers have set up six arsenic treatment plants in <a href="/wiki/West_Bengal" title="West Bengal">West Bengal</a> based on in-situ remediation method (SAR Technology). This technology does not use any chemicals and arsenic is left in an insoluble form (+5 state) in the subterranean zone by recharging aerated water into the aquifer and developing an oxidation zone that supports arsenic oxidizing micro-organisms. This process does not produce any waste stream or sludge and is relatively cheap.<sup id="cite_ref-157" class="reference"><a href="#cite_note-157"><span class="cite-bracket">&#91;</span>157<span class="cite-bracket">&#93;</span></a></sup> </p><p>Another effective and inexpensive method to avoid arsenic contamination is to sink wells 500&#160;feet or deeper to reach purer waters. A recent 2011 study funded by the US National Institute of Environmental Health Sciences' Superfund Research Program shows that deep sediments can remove arsenic and take it out of circulation. In this process, called <i>adsorption</i>, arsenic sticks to the surfaces of deep sediment particles and is naturally removed from the ground water.<sup id="cite_ref-158" class="reference"><a href="#cite_note-158"><span class="cite-bracket">&#91;</span>158<span class="cite-bracket">&#93;</span></a></sup> </p><p>Magnetic separations of arsenic at very low magnetic field <a href="/wiki/Gradient" title="Gradient">gradients</a> with high-surface-area and <a href="/wiki/Monodisperse" class="mw-redirect" title="Monodisperse">monodisperse</a> <a href="/wiki/Magnetite" title="Magnetite">magnetite</a> (Fe<sub>3</sub>O<sub>4</sub>) nanocrystals have been demonstrated in point-of-use water purification. Using the high specific surface area of Fe<sub>3</sub>O<sub>4</sub> nanocrystals, the mass of waste associated with arsenic removal from water has been dramatically reduced.<sup id="cite_ref-159" class="reference"><a href="#cite_note-159"><span class="cite-bracket">&#91;</span>159<span class="cite-bracket">&#93;</span></a></sup> </p><p>Epidemiological studies have suggested a correlation between chronic consumption of drinking water contaminated with arsenic and the incidence of all leading causes of mortality.<sup id="cite_ref-160" class="reference"><a href="#cite_note-160"><span class="cite-bracket">&#91;</span>160<span class="cite-bracket">&#93;</span></a></sup> The literature indicates that arsenic exposure is causative in the pathogenesis of diabetes.<sup id="cite_ref-161" class="reference"><a href="#cite_note-161"><span class="cite-bracket">&#91;</span>161<span class="cite-bracket">&#93;</span></a></sup> </p><p>Chaff-based filters have recently been shown to reduce the arsenic content of water to 3&#160;μg/L. This may find applications in areas where the potable water is extracted from underground <a href="/wiki/Aquifer" title="Aquifer">aquifers</a>.<sup id="cite_ref-162" class="reference"><a href="#cite_note-162"><span class="cite-bracket">&#91;</span>162<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="San_Pedro_de_Atacama">San Pedro de Atacama</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=25" title="Edit section: San Pedro de Atacama"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>For several centuries, the people of <a href="/wiki/San_Pedro_de_Atacama" title="San Pedro de Atacama">San Pedro de Atacama</a> in Chile have been drinking water that is contaminated with arsenic, and some evidence suggests they have developed some immunity.<sup id="cite_ref-163" class="reference"><a href="#cite_note-163"><span class="cite-bracket">&#91;</span>163<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-164" class="reference"><a href="#cite_note-164"><span class="cite-bracket">&#91;</span>164<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-165" class="reference"><a href="#cite_note-165"><span class="cite-bracket">&#91;</span>165<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Hazard_maps_for_contaminated_groundwater">Hazard maps for contaminated groundwater</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=26" title="Edit section: Hazard maps for contaminated groundwater"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Around one-third of the world's population drinks water from groundwater resources. Of this, about 10 percent, approximately 300&#160;million people, obtains water from groundwater resources that are contaminated with unhealthy levels of arsenic or fluoride.<sup id="cite_ref-166" class="reference"><a href="#cite_note-166"><span class="cite-bracket">&#91;</span>166<span class="cite-bracket">&#93;</span></a></sup> These trace elements derive mainly from minerals and ions in the ground.<sup id="cite_ref-167" class="reference"><a href="#cite_note-167"><span class="cite-bracket">&#91;</span>167<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-168" class="reference"><a href="#cite_note-168"><span class="cite-bracket">&#91;</span>168<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Redox_transformation_of_arsenic_in_natural_waters">Redox transformation of arsenic in natural waters</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=27" title="Edit section: Redox transformation of arsenic in natural waters"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic is unique among the trace <a href="/wiki/Metalloids" class="mw-redirect" title="Metalloids">metalloids</a> and oxyanion-forming trace metals (e.g. As, Se, Sb, Mo, V, Cr, U, Re). It is sensitive to mobilization at pH values typical of natural waters (pH 6.5–8.5) under both oxidizing and reducing conditions. Arsenic can occur in the environment in several oxidation states (−3, 0, +3 and +5), but in natural waters it is mostly found in inorganic forms as oxyanions of trivalent arsenite [As(III)] or pentavalent arsenate [As(V)]. Organic forms of arsenic are produced by biological activity, mostly in surface waters, but are rarely quantitatively important. Organic arsenic compounds may, however, occur where waters are significantly impacted by industrial pollution.<sup id="cite_ref-169" class="reference"><a href="#cite_note-169"><span class="cite-bracket">&#91;</span>169<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic may be solubilized by various processes. When pH is high, arsenic may be released from surface binding sites that lose their positive charge. When water level drops and <a href="/wiki/Sulfide" title="Sulfide">sulfide</a> minerals are exposed to air, arsenic trapped in sulfide minerals can be released into water. When organic carbon is present in water, bacteria are fed by directly reducing As(V) to As(III) or by reducing the element at the binding site, releasing inorganic arsenic.<sup id="cite_ref-170" class="reference"><a href="#cite_note-170"><span class="cite-bracket">&#91;</span>170<span class="cite-bracket">&#93;</span></a></sup> </p><p>The aquatic transformations of arsenic are affected by pH, reduction-oxidation potential, organic matter concentration and the concentrations and forms of other elements, especially iron and manganese. The main factors are pH and the redox potential. Generally, the main forms of arsenic under oxic conditions are <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>AsO<sub class="template-chem2-sub">4</sub></span>, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>AsO<span class="template-chem2-su"><span>−</span><span>4</span></span></span>, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">HAsO<span class="template-chem2-su"><span>2−</span><span>4</span></span></span>, and <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">AsO<span class="template-chem2-su"><span>3−</span><span>4</span></span></span> at pH 2, 2–7, 7–11 and 11, respectively. Under reducing conditions, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>AsO<sub class="template-chem2-sub">4</sub></span> is predominant at pH 2–9. </p><p>Oxidation and reduction affects the migration of arsenic in subsurface environments. Arsenite is the most stable soluble form of arsenic in reducing environments and arsenate, which is less mobile than arsenite, is dominant in oxidizing environments at neutral <a href="/wiki/PH" title="PH">pH</a>. Therefore, arsenic may be more mobile under reducing conditions. The reducing environment is also rich in organic matter which may enhance the solubility of arsenic compounds. As a result, the <a href="/wiki/Adsorption" title="Adsorption">adsorption</a> of arsenic is reduced and dissolved arsenic accumulates in groundwater. That is why the arsenic content is higher in reducing environments than in oxidizing environments.<sup id="cite_ref-171" class="reference"><a href="#cite_note-171"><span class="cite-bracket">&#91;</span>171<span class="cite-bracket">&#93;</span></a></sup> </p><p>The presence of sulfur is another factor that affects the transformation of arsenic in natural water. Arsenic can <a href="/wiki/Precipitate" class="mw-redirect" title="Precipitate">precipitate</a> when metal sulfides form. In this way, arsenic is removed from the water and its mobility decreases. When oxygen is present, bacteria oxidize reduced sulfur to generate energy, potentially releasing bound arsenic. </p><p>Redox reactions involving Fe also appear to be essential factors in the fate of arsenic in aquatic systems. The reduction of iron oxyhydroxides plays a key role in the release of arsenic to water. So arsenic can be enriched in water with elevated Fe concentrations.<sup id="cite_ref-172" class="reference"><a href="#cite_note-172"><span class="cite-bracket">&#91;</span>172<span class="cite-bracket">&#93;</span></a></sup> Under oxidizing conditions, arsenic can be mobilized from <a href="/wiki/Pyrite" title="Pyrite">pyrite</a> or iron oxides especially at elevated pH. Under reducing conditions, arsenic can be mobilized by reductive desorption or dissolution when associated with iron oxides. The reductive desorption occurs under two circumstances. One is when arsenate is reduced to arsenite which adsorbs to iron oxides less strongly. The other results from a change in the charge on the mineral surface which leads to the desorption of bound arsenic.<sup id="cite_ref-173" class="reference"><a href="#cite_note-173"><span class="cite-bracket">&#91;</span>173<span class="cite-bracket">&#93;</span></a></sup> </p><p>Some species of bacteria catalyze redox transformations of arsenic. Dissimilatory arsenate-respiring prokaryotes (DARP) speed up the reduction of As(V) to As(III). DARP use As(V) as the electron acceptor of anaerobic respiration and obtain energy to survive. Other organic and inorganic substances can be oxidized in this process. <a href="/wiki/Chemoautotrophic" class="mw-redirect" title="Chemoautotrophic">Chemoautotrophic</a> arsenite oxidizers (CAO) and <a href="/wiki/Heterotrophic" class="mw-redirect" title="Heterotrophic">heterotrophic</a> arsenite oxidizers (HAO) convert As(III) into As(V). CAO combine the oxidation of As(III) with the reduction of oxygen or nitrate. They use obtained energy to fix produce organic carbon from CO<sub>2</sub>. HAO cannot obtain energy from As(III) oxidation. This process may be an arsenic <a href="/wiki/Detoxification" title="Detoxification">detoxification</a> mechanism for the bacteria.<sup id="cite_ref-174" class="reference"><a href="#cite_note-174"><span class="cite-bracket">&#91;</span>174<span class="cite-bracket">&#93;</span></a></sup> </p><p>Equilibrium thermodynamic calculations predict that As(V) concentrations should be greater than As(III) concentrations in all but strongly reducing conditions, i.e. where <a href="/wiki/Sulfate" title="Sulfate">sulfate</a> reduction is occurring. However, abiotic redox reactions of arsenic are slow. Oxidation of As(III) by dissolved O<sub>2</sub> is a particularly slow reaction. For example, Johnson and Pilson (1975) gave <a href="/wiki/Half-life" title="Half-life">half-lives</a> for the oxygenation of As(III) in seawater ranging from several months to a year.<sup id="cite_ref-175" class="reference"><a href="#cite_note-175"><span class="cite-bracket">&#91;</span>175<span class="cite-bracket">&#93;</span></a></sup> In other studies, As(V)/As(III) ratios were stable over periods of days or weeks during water sampling when no particular care was taken to prevent oxidation, again suggesting relatively slow oxidation rates. Cherry found from experimental studies that the As(V)/As(III) ratios were stable in anoxic solutions for up to 3 weeks but that gradual changes occurred over longer timescales.<sup id="cite_ref-176" class="reference"><a href="#cite_note-176"><span class="cite-bracket">&#91;</span>176<span class="cite-bracket">&#93;</span></a></sup> Sterile water samples have been observed to be less susceptible to speciation changes than non-sterile samples.<sup id="cite_ref-177" class="reference"><a href="#cite_note-177"><span class="cite-bracket">&#91;</span>177<span class="cite-bracket">&#93;</span></a></sup> Oremland found that the reduction of As(V) to As(III) in Mono Lake was rapidly catalyzed by bacteria with rate constants ranging from 0.02 to 0.3-day<sup>−1</sup>.<sup id="cite_ref-178" class="reference"><a href="#cite_note-178"><span class="cite-bracket">&#91;</span>178<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Wood_preservation_in_the_US">Wood preservation in the US</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=28" title="Edit section: Wood preservation in the US"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>As of 2002, US-based industries consumed 19,600 metric tons of arsenic. Ninety percent of this was used for treatment of wood with <a href="/wiki/Chromated_copper_arsenate" title="Chromated copper arsenate">chromated copper arsenate</a> (CCA). In 2007, 50% of the 5,280 metric tons of consumption was still used for this purpose.<sup id="cite_ref-USGSYB2007_55-1" class="reference"><a href="#cite_note-USGSYB2007-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-179" class="reference"><a href="#cite_note-179"><span class="cite-bracket">&#91;</span>179<span class="cite-bracket">&#93;</span></a></sup> In the United States, the voluntary phasing-out of arsenic in production of consumer products and residential and general consumer construction products began on 31 December 2003, and alternative chemicals are now used, such as <a href="/wiki/Alkaline_Copper_Quaternary" class="mw-redirect" title="Alkaline Copper Quaternary">Alkaline Copper Quaternary</a>, <a href="/wiki/Borate" title="Borate">borates</a>, <a href="/wiki/Wood_preservation#Copper_azole" title="Wood preservation">copper azole</a>, <a href="/wiki/Cyproconazole" title="Cyproconazole">cyproconazole</a>, and <a href="/wiki/Propiconazole" title="Propiconazole">propiconazole</a>.<sup id="cite_ref-180" class="reference"><a href="#cite_note-180"><span class="cite-bracket">&#91;</span>180<span class="cite-bracket">&#93;</span></a></sup> </p><p>Although discontinued, this application is also one of the most concerning to the general public. The vast majority of older <a href="/wiki/Timber_treatment" class="mw-redirect" title="Timber treatment">pressure-treated</a> wood was treated with CCA. CCA lumber is still in widespread use in many countries, and was heavily used during the latter half of the 20th century as a structural and outdoor <a href="/wiki/Building_material" title="Building material">building material</a>. Although the use of CCA lumber was banned in many areas after studies showed that arsenic could leach out of the wood into the surrounding <a href="/wiki/Soil" title="Soil">soil</a> (from playground equipment, for instance), a risk is also presented by the burning of older CCA timber. The direct or indirect ingestion of wood ash from burnt CCA lumber has caused fatalities in animals and serious poisonings in humans; the lethal human dose is approximately 20&#160;grams of ash.<sup id="cite_ref-181" class="reference"><a href="#cite_note-181"><span class="cite-bracket">&#91;</span>181<span class="cite-bracket">&#93;</span></a></sup> Scrap CCA lumber from construction and demolition sites may be inadvertently used in commercial and domestic fires. Protocols for safe disposal of CCA lumber are not consistent throughout the world. Widespread <a href="/wiki/Landfill" title="Landfill">landfill</a> disposal of such timber raises some concern,<sup id="cite_ref-182" class="reference"><a href="#cite_note-182"><span class="cite-bracket">&#91;</span>182<span class="cite-bracket">&#93;</span></a></sup> but other studies have shown no arsenic contamination in the groundwater.<sup id="cite_ref-183" class="reference"><a href="#cite_note-183"><span class="cite-bracket">&#91;</span>183<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-184" class="reference"><a href="#cite_note-184"><span class="cite-bracket">&#91;</span>184<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Mapping_of_industrial_releases_in_the_US">Mapping of industrial releases in the US</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=29" title="Edit section: Mapping of industrial releases in the US"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>One tool that maps the location (and other information) of arsenic releases in the United States is <a href="/wiki/TOXMAP" title="TOXMAP">TOXMAP</a>.<sup id="cite_ref-185" class="reference"><a href="#cite_note-185"><span class="cite-bracket">&#91;</span>185<span class="cite-bracket">&#93;</span></a></sup> TOXMAP is a Geographic Information System (GIS) from the Division of Specialized Information Services of the <a href="/wiki/United_States_National_Library_of_Medicine" title="United States National Library of Medicine">United States National Library of Medicine</a> (NLM) funded by the US Federal Government. With marked-up maps of the United States, TOXMAP enables users to visually explore data from the <a href="/wiki/United_States_Environmental_Protection_Agency" title="United States Environmental Protection Agency">United States Environmental Protection Agency</a>'s (EPA) <a href="/wiki/Toxics_Release_Inventory" title="Toxics Release Inventory">Toxics Release Inventory</a> and <a href="/wiki/Superfund_Basic_Research_Program" class="mw-redirect" title="Superfund Basic Research Program">Superfund Basic Research Programs</a>. TOXMAP's chemical and environmental health information is taken from NLM's Toxicology Data Network (TOXNET),<sup id="cite_ref-186" class="reference"><a href="#cite_note-186"><span class="cite-bracket">&#91;</span>186<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/PubMed" title="PubMed">PubMed</a>, and from other authoritative sources. </p> <div class="mw-heading mw-heading3"><h3 id="Bioremediation">Bioremediation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=30" title="Edit section: Bioremediation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Physical, chemical, and biological methods have been used to remediate arsenic contaminated water.<sup id="cite_ref-JEM-2012_187-0" class="reference"><a href="#cite_note-JEM-2012-187"><span class="cite-bracket">&#91;</span>187<span class="cite-bracket">&#93;</span></a></sup> Bioremediation is said to be cost-effective and environmentally friendly.<sup id="cite_ref-188" class="reference"><a href="#cite_note-188"><span class="cite-bracket">&#91;</span>188<span class="cite-bracket">&#93;</span></a></sup> Bioremediation of ground water contaminated with arsenic aims to convert arsenite, the toxic form of arsenic to humans, to arsenate. Arsenate (+5 oxidation state) is the dominant form of arsenic in surface water, while arsenite (+3 oxidation state) is the dominant form in hypoxic to anoxic environments. Arsenite is more soluble and mobile than arsenate. Many species of bacteria can transform arsenite to arsenate in anoxic conditions by using arsenite as an electron donor.<sup id="cite_ref-189" class="reference"><a href="#cite_note-189"><span class="cite-bracket">&#91;</span>189<span class="cite-bracket">&#93;</span></a></sup> This is a useful method in ground water remediation. Another bioremediation strategy is to use plants that accumulate arsenic in their tissues via <a href="/wiki/Phytoremediation" title="Phytoremediation">phytoremediation</a> but the disposal of contaminated plant material needs to be considered. </p><p>Bioremediation requires careful evaluation and design in accordance with existing conditions. Some sites may require the addition of an electron acceptor while others require microbe supplementation (<a href="/wiki/Bioaugmentation" title="Bioaugmentation">bioaugmentation</a>). Regardless of the method used, only constant monitoring can prevent future contamination. </p> <div class="mw-heading mw-heading3"><h3 id="Arsenic_removal">Arsenic removal</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=31" title="Edit section: Arsenic removal"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Coagulation_(water_treatment)" title="Coagulation (water treatment)">Coagulation</a> and <a href="/wiki/Flocculation" title="Flocculation">flocculation</a> are closely related processes common in arsenate removal from water. Due to the net negative charge carried by arsenate ions, they settle slowly or not at all due to charge repulsion. In coagulation, a positively charged coagulent such as iron and aluminum (commonly used salts: FeCl<sub>3</sub>,<sup id="cite_ref-Bina_2013_17_190-0" class="reference"><a href="#cite_note-Bina_2013_17-190"><span class="cite-bracket">&#91;</span>190<span class="cite-bracket">&#93;</span></a></sup> Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>,<sup id="cite_ref-191" class="reference"><a href="#cite_note-191"><span class="cite-bracket">&#91;</span>191<span class="cite-bracket">&#93;</span></a></sup> Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub><sup id="cite_ref-192" class="reference"><a href="#cite_note-192"><span class="cite-bracket">&#91;</span>192<span class="cite-bracket">&#93;</span></a></sup>) neutralize the negatively charged arsenate, enable it to settle. Flocculation follows where a flocculant bridges smaller particles and allows the aggregate to precipitate out from water. However, such methods may not be efficient on arsenite as As(III) exists in uncharged arsenious acid, H<sub>3</sub>AsO<sub>3</sub>, at near-neutral pH.<sup id="cite_ref-193" class="reference"><a href="#cite_note-193"><span class="cite-bracket">&#91;</span>193<span class="cite-bracket">&#93;</span></a></sup> </p><p>The major drawbacks of coagulation and flocculation are the costly disposal of arsenate-concentrated sludge, and possible <a href="/w/index.php?title=Secondary_contamination&amp;action=edit&amp;redlink=1" class="new" title="Secondary contamination (page does not exist)">secondary contamination</a> of environment. Moreover, coagulents such as iron may produce ion contamination that exceeds safety levels.<sup id="cite_ref-Bina_2013_17_190-1" class="reference"><a href="#cite_note-Bina_2013_17-190"><span class="cite-bracket">&#91;</span>190<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Toxicity_and_precautions">Toxicity and precautions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=32" title="Edit section: Toxicity and precautions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">Arsenic poisoning</a></div> <style data-mw-deduplicate="TemplateStyles:r1268415487">.mw-parser-output .ib-chembox{border-collapse:collapse;text-align:left}.mw-parser-output .ib-chembox td,.mw-parser-output .ib-chembox th{border:1px solid #a2a9b1;width:40%}.mw-parser-output .ib-chembox td+td{width:60%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .ib-chembox figure:not(.skin-invert-image):not(.skin-invert):not(.bg-transparent){background:var(--background-color-inverted,#f8f9fa)}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .ib-chembox figure:not(.skin-invert-image):not(.skin-invert):not(.bg-transparent){background:var(--background-color-inverted,#f8f9fa)}}</style> <table class="infobox ib-chembox"> <caption>Arsenic </caption> <tbody><tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Hazards </th></tr> <tr> <td colspan="2" style="text-align:left; background-color:#eaeaea;color:inherit;"><a href="/wiki/Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals" title="Globally Harmonized System of Classification and Labelling of Chemicals"><b>GHS</b> labelling</a>:<sup id="cite_ref-194" class="reference"><a href="#cite_note-194"><span class="cite-bracket">&#91;</span>194<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/GHS_hazard_pictograms" title="GHS hazard pictograms">Pictograms</a></div> </td> <td><span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-acid.svg" class="mw-file-description" title="GHS05: Corrosive"><img alt="GHS05: Corrosive" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/GHS-pictogram-acid.svg/50px-GHS-pictogram-acid.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/GHS-pictogram-acid.svg/75px-GHS-pictogram-acid.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a1/GHS-pictogram-acid.svg/100px-GHS-pictogram-acid.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span> <span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-skull.svg" class="mw-file-description" title="GHS06: Toxic"><img alt="GHS06: Toxic" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/GHS-pictogram-skull.svg/50px-GHS-pictogram-skull.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/GHS-pictogram-skull.svg/75px-GHS-pictogram-skull.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/GHS-pictogram-skull.svg/100px-GHS-pictogram-skull.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span> <span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-silhouette.svg" class="mw-file-description" title="GHS08: Health hazard"><img alt="GHS08: Health hazard" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/GHS-pictogram-silhouette.svg/50px-GHS-pictogram-silhouette.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/GHS-pictogram-silhouette.svg/75px-GHS-pictogram-silhouette.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/21/GHS-pictogram-silhouette.svg/100px-GHS-pictogram-silhouette.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span> <span typeof="mw:File"><a href="/wiki/File:GHS-pictogram-pollu.svg" class="mw-file-description" title="GHS09: Environmental hazard"><img alt="GHS09: Environmental hazard" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/GHS-pictogram-pollu.svg/50px-GHS-pictogram-pollu.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/GHS-pictogram-pollu.svg/75px-GHS-pictogram-pollu.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b9/GHS-pictogram-pollu.svg/100px-GHS-pictogram-pollu.svg.png 2x" data-file-width="724" data-file-height="724" /></a></span> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals#Signal_word" title="Globally Harmonized System of Classification and Labelling of Chemicals">Signal word</a></div> </td> <td><b>Danger</b> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/GHS_hazard_statements" title="GHS hazard statements">Hazard statements</a></div> </td> <td><abbr class="abbr" title="H301+H331: Toxic if swallowed or if inhaled">H301+H331</abbr>, <abbr class="abbr" title="H315: Causes skin irritation">H315</abbr>, <abbr class="abbr" title="H318: Causes serious eye damage">H318</abbr>, <abbr class="abbr" title="H350: May cause cancer">H350</abbr>, <abbr class="abbr" title="H410: Very toxic to aquatic life with long lasting effects">H410</abbr> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/GHS_precautionary_statements" title="GHS precautionary statements">Precautionary statements</a></div> </td> <td><abbr class="abbr" title="P273: Avoid release to the environment.">P273</abbr>, <abbr class="abbr" title="P280: Wear protective gloves/protective clothing/eye protection/face protection.">P280</abbr>, <abbr class="abbr" title="P301+P310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.">P301+P310</abbr>, <abbr class="abbr" title="P302+P352: IF ON SKIN: Wash with soap and water.">P302+P352</abbr>, <abbr class="abbr" title="P304+P340+P311: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Call a POISON CENTER or doctor/physician.">P304+P340+P311</abbr>, <abbr class="abbr" title="P305+P351+P338: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.">P305+P351+P338</abbr> </td></tr> </tbody></table><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Chemical compound</div> <p>Arsenic and many of its compounds are especially potent poisons (e.g. <a href="/wiki/Arsine" title="Arsine">arsine</a>). Small amount of arsenic can be detected by pharmacopoial methods which includes reduction of arsenic to arsenious with help of zinc and can be confirmed with mercuric chloride paper.<sup id="cite_ref-195" class="reference"><a href="#cite_note-195"><span class="cite-bracket">&#91;</span>195<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Classification">Classification</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=33" title="Edit section: Classification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Elemental arsenic and arsenic sulfate and trioxide compounds are classified as "<a href="/wiki/Toxicity" title="Toxicity">toxic</a>" and "dangerous for the environment" in the European Union under <a href="/wiki/Directive_67/548/EEC" title="Directive 67/548/EEC">directive 67/548/EEC</a>. The <a href="/wiki/International_Agency_for_Research_on_Cancer" title="International Agency for Research on Cancer">International Agency for Research on Cancer</a> (IARC) recognizes arsenic and inorganic arsenic compounds as <a href="/wiki/List_of_IARC_Group_1_carcinogens" class="mw-redirect" title="List of IARC Group 1 carcinogens">group 1 carcinogens</a>, and the EU lists arsenic trioxide, <a href="/wiki/Arsenic_pentoxide" title="Arsenic pentoxide">arsenic pentoxide</a>, and <a href="/wiki/Arsenate" title="Arsenate">arsenate</a> salts as category 1 <a href="/wiki/Carcinogen" title="Carcinogen">carcinogens</a>. </p><p>Arsenic is known to cause <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">arsenicosis</a> when present in drinking water, "the most common species being arsenate [<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">HAsO<span class="template-chem2-su"><span>2−</span><span>4</span></span></span>; As(V)] and arsenite [<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>AsO<sub class="template-chem2-sub">3</sub></span>; As(III)]". </p> <div class="mw-heading mw-heading3"><h3 id="Legal_limits,_food,_and_drink"><span id="Legal_limits.2C_food.2C_and_drink"></span>Legal limits, food, and drink</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=34" title="Edit section: Legal limits, food, and drink"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the United States since 2006, the maximum concentration in drinking water allowed by the <a href="/wiki/Environmental_Protection_Agency" class="mw-redirect" title="Environmental Protection Agency">Environmental Protection Agency</a> (EPA) is 10&#160;ppb<sup id="cite_ref-196" class="reference"><a href="#cite_note-196"><span class="cite-bracket">&#91;</span>196<span class="cite-bracket">&#93;</span></a></sup> and the FDA set the same standard in 2005 for bottled water.<sup id="cite_ref-fda_metals_197-0" class="reference"><a href="#cite_note-fda_metals-197"><span class="cite-bracket">&#91;</span>197<span class="cite-bracket">&#93;</span></a></sup> The Department of Environmental Protection for New Jersey set a drinking water limit of 5&#160;ppb in 2006.<sup id="cite_ref-198" class="reference"><a href="#cite_note-198"><span class="cite-bracket">&#91;</span>198<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/IDLH" class="mw-redirect" title="IDLH">IDLH</a> (immediately dangerous to life and health) value for arsenic metal and inorganic arsenic compounds is 5&#160;mg/m<sup>3</sup> (5&#160;ppb). The <a href="/wiki/Occupational_Safety_and_Health_Administration" title="Occupational Safety and Health Administration">Occupational Safety and Health Administration</a> has set the <a href="/wiki/Permissible_exposure_limit" title="Permissible exposure limit">permissible exposure limit</a> (PEL) to a time-weighted average (TWA) of 0.01&#160;mg/m<sup>3</sup> (0.01&#160;ppb), and the <a href="/wiki/National_Institute_for_Occupational_Safety_and_Health" title="National Institute for Occupational Safety and Health">National Institute for Occupational Safety and Health</a> (NIOSH) has set the <a href="/wiki/Recommended_exposure_limit" title="Recommended exposure limit">recommended exposure limit</a> (REL) to a 15-minute constant exposure of 0.002&#160;mg/m<sup>3</sup> (0.002&#160;ppb).<sup id="cite_ref-PGCH_199-0" class="reference"><a href="#cite_note-PGCH-199"><span class="cite-bracket">&#91;</span>199<span class="cite-bracket">&#93;</span></a></sup> The PEL for organic arsenic compounds is a TWA of 0.5&#160;mg/m<sup>3</sup>.<sup id="cite_ref-200" class="reference"><a href="#cite_note-200"><span class="cite-bracket">&#91;</span>200<span class="cite-bracket">&#93;</span></a></sup> (0.5&#160;ppb). </p><p>In 2008, based on its ongoing testing of a wide variety of American foods for toxic chemicals,<sup id="cite_ref-201" class="reference"><a href="#cite_note-201"><span class="cite-bracket">&#91;</span>201<span class="cite-bracket">&#93;</span></a></sup> the U.S. <a href="/wiki/Food_and_Drug_Administration" title="Food and Drug Administration">Food and Drug Administration</a> set the "level of concern" for inorganic arsenic in apple and pear juices at 23&#160;ppb, based on non-carcinogenic effects, and began blocking importation of products in excess of this level; it also required recalls for non-conforming domestic products.<sup id="cite_ref-fda_metals_197-1" class="reference"><a href="#cite_note-fda_metals-197"><span class="cite-bracket">&#91;</span>197<span class="cite-bracket">&#93;</span></a></sup> In 2011, the national <i><a href="/wiki/The_Dr._Oz_Show" title="The Dr. Oz Show">Dr. Oz</a></i> television show broadcast a program highlighting tests performed by an independent lab hired by the producers. Though the methodology was disputed (it did not distinguish between organic and inorganic arsenic) the tests showed levels of arsenic up to 36&#160;ppb.<sup id="cite_ref-202" class="reference"><a href="#cite_note-202"><span class="cite-bracket">&#91;</span>202<span class="cite-bracket">&#93;</span></a></sup> In response, the FDA tested the worst brand from the <i>Dr.</i> <i>Oz</i> show and found much lower levels. Ongoing testing found 95% of the apple juice samples were below the level of concern. Later testing by <a href="/wiki/Consumer_Reports" title="Consumer Reports">Consumer Reports</a> showed inorganic arsenic at levels slightly above 10&#160;ppb, and the organization urged parents to reduce consumption.<sup id="cite_ref-203" class="reference"><a href="#cite_note-203"><span class="cite-bracket">&#91;</span>203<span class="cite-bracket">&#93;</span></a></sup> In July 2013, on consideration of consumption by children, chronic exposure, and carcinogenic effect, the FDA established an "action level" of 10&#160;ppb for apple juice, the same as the drinking water standard.<sup id="cite_ref-fda_metals_197-2" class="reference"><a href="#cite_note-fda_metals-197"><span class="cite-bracket">&#91;</span>197<span class="cite-bracket">&#93;</span></a></sup> </p><p>Concern about arsenic in rice in Bangladesh was raised in 2002, but at the time only Australia had a legal limit for food (one milligram per kilogram, or 1000 ppb).<sup id="cite_ref-204" class="reference"><a href="#cite_note-204"><span class="cite-bracket">&#91;</span>204<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-205" class="reference"><a href="#cite_note-205"><span class="cite-bracket">&#91;</span>205<span class="cite-bracket">&#93;</span></a></sup> Concern was raised about people who were eating U.S. rice exceeding WHO standards for personal arsenic intake in 2005.<sup id="cite_ref-206" class="reference"><a href="#cite_note-206"><span class="cite-bracket">&#91;</span>206<span class="cite-bracket">&#93;</span></a></sup> In 2011, the People's Republic of China set a food standard of 150&#160;ppb for arsenic.<sup id="cite_ref-207" class="reference"><a href="#cite_note-207"><span class="cite-bracket">&#91;</span>207<span class="cite-bracket">&#93;</span></a></sup> </p><p>In the United States in 2012, testing by separate groups of researchers at the Children's Environmental Health and Disease Prevention Research Center at <a href="/wiki/Dartmouth_College" title="Dartmouth College">Dartmouth College</a> (early in the year, focusing on urinary levels in children)<sup id="cite_ref-208" class="reference"><a href="#cite_note-208"><span class="cite-bracket">&#91;</span>208<span class="cite-bracket">&#93;</span></a></sup> and <a href="/wiki/Consumer_Reports" title="Consumer Reports">Consumer Reports</a> (in November)<sup id="cite_ref-209" class="reference"><a href="#cite_note-209"><span class="cite-bracket">&#91;</span>209<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-cr_rice_210-0" class="reference"><a href="#cite_note-cr_rice-210"><span class="cite-bracket">&#91;</span>210<span class="cite-bracket">&#93;</span></a></sup> found levels of arsenic in rice that resulted in calls for the FDA to set limits.<sup id="cite_ref-foodsafetynews_211-0" class="reference"><a href="#cite_note-foodsafetynews-211"><span class="cite-bracket">&#91;</span>211<span class="cite-bracket">&#93;</span></a></sup> The FDA released some testing results in September 2012,<sup id="cite_ref-212" class="reference"><a href="#cite_note-212"><span class="cite-bracket">&#91;</span>212<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-213" class="reference"><a href="#cite_note-213"><span class="cite-bracket">&#91;</span>213<span class="cite-bracket">&#93;</span></a></sup> and as of July 2013, is still collecting data in support of a new potential regulation. It has not recommended any changes in consumer behavior.<sup id="cite_ref-214" class="reference"><a href="#cite_note-214"><span class="cite-bracket">&#91;</span>214<span class="cite-bracket">&#93;</span></a></sup> </p><p>Consumer Reports recommended: </p> <ol><li>That the EPA and FDA eliminate arsenic-containing fertilizer, drugs, and pesticides in food production;</li> <li>That the FDA establish a legal limit for food;</li> <li>That industry change production practices to lower arsenic levels, especially in food for children; and</li> <li>That consumers test home water supplies, eat a varied diet, and cook rice with excess water, then draining it off (reducing inorganic arsenic by about one third along with a slight reduction in vitamin content).<sup id="cite_ref-cr_rice_210-1" class="reference"><a href="#cite_note-cr_rice-210"><span class="cite-bracket">&#91;</span>210<span class="cite-bracket">&#93;</span></a></sup></li> <li>Evidence-based public health advocates also recommend that, given the lack of regulation or labeling for arsenic in the U.S., children should eat no more than 1.5 servings per week of rice and should not drink rice milk as part of their daily diet before age 5.<sup id="cite_ref-berkeleywellness_215-0" class="reference"><a href="#cite_note-berkeleywellness-215"><span class="cite-bracket">&#91;</span>215<span class="cite-bracket">&#93;</span></a></sup> They also offer recommendations for adults and infants on how to limit arsenic exposure from rice, drinking water, and fruit juice.<sup id="cite_ref-berkeleywellness_215-1" class="reference"><a href="#cite_note-berkeleywellness-215"><span class="cite-bracket">&#91;</span>215<span class="cite-bracket">&#93;</span></a></sup></li></ol> <p>A 2014 <a href="/wiki/World_Health_Organization" title="World Health Organization">World Health Organization</a> advisory conference was scheduled to consider limits of 200–300&#160;ppb for rice.<sup id="cite_ref-cr_rice_210-2" class="reference"><a href="#cite_note-cr_rice-210"><span class="cite-bracket">&#91;</span>210<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Reducing_arsenic_content_in_rice">Reducing arsenic content in rice</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=35" title="Edit section: Reducing arsenic content in rice"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg/300px-Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg" decoding="async" width="300" height="173" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg/450px-Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg/600px-Improved_rice_cooking_approach_to_maximise_arsenic_removal_while_preserving_nutrient_elements.jpg 2x" data-file-width="1535" data-file-height="886" /></a><figcaption>An improved rice cooking approach to maximise arsenic removal while preserving nutrient elements<sup id="cite_ref-cookingmethod_216-0" class="reference"><a href="#cite_note-cookingmethod-216"><span class="cite-bracket">&#91;</span>216<span class="cite-bracket">&#93;</span></a></sup></figcaption></figure> <p>In 2020, scientists assessed multiple preparation procedures of rice for their capacity to reduce arsenic content and preserve nutrients, recommending a procedure involving <a href="/wiki/Parboiling#Parboiled_rice" title="Parboiling">parboiling</a> and water-absorption.<sup id="cite_ref-217" class="reference"><a href="#cite_note-217"><span class="cite-bracket">&#91;</span>217<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-cookingmethod_216-1" class="reference"><a href="#cite_note-cookingmethod-216"><span class="cite-bracket">&#91;</span>216<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-218" class="reference"><a href="#cite_note-218"><span class="cite-bracket">&#91;</span>218<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Occupational_exposure_limits">Occupational exposure limits</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=36" title="Edit section: Occupational exposure limits"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable"> <tbody><tr> <th>Country </th> <th>Limit<sup id="cite_ref-219" class="reference"><a href="#cite_note-219"><span class="cite-bracket">&#91;</span>219<span class="cite-bracket">&#93;</span></a></sup> </th></tr> <tr> <td><a href="/wiki/Argentina" title="Argentina">Argentina</a> </td> <td>Confirmed human carcinogen </td></tr> <tr> <td>Australia </td> <td>TWA 0.05&#160;mg/m<sup>3</sup> – Carcinogen </td></tr> <tr> <td><a href="/wiki/Belgium" title="Belgium">Belgium</a> </td> <td>TWA 0.1&#160;mg/m<sup>3</sup> – Carcinogen </td></tr> <tr> <td><a href="/wiki/Bulgaria" title="Bulgaria">Bulgaria</a> </td> <td>Confirmed human carcinogen </td></tr> <tr> <td>Canada </td> <td>TWA 0.01&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Colombia" title="Colombia">Colombia</a> </td> <td>Confirmed human carcinogen </td></tr> <tr> <td><a href="/wiki/Denmark" title="Denmark">Denmark</a> </td> <td>TWA 0.01&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Finland" title="Finland">Finland</a> </td> <td>Carcinogen </td></tr> <tr> <td><a href="/wiki/Egypt" title="Egypt">Egypt</a> </td> <td>TWA 0.2&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Hungary" title="Hungary">Hungary</a> </td> <td>Ceiling concentration 0.01&#160;mg/m<sup>3</sup> – Skin, carcinogen </td></tr> <tr> <td>India </td> <td>TWA 0.2&#160;mg/m<sup>3</sup> </td></tr> <tr> <td>Japan </td> <td>Group 1 carcinogen </td></tr> <tr> <td><a href="/wiki/Jordan" title="Jordan">Jordan</a> </td> <td>Confirmed human carcinogen </td></tr> <tr> <td>Mexico </td> <td>TWA 0.2&#160;mg/m<sup>3</sup> </td></tr> <tr> <td>New Zealand </td> <td>TWA 0.05&#160;mg/m<sup>3</sup> – Carcinogen </td></tr> <tr> <td><a href="/wiki/Norway" title="Norway">Norway</a> </td> <td>TWA 0.02&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Philippines" title="Philippines">Philippines</a> </td> <td>TWA 0.5&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Poland" title="Poland">Poland</a> </td> <td>TWA 0.01&#160;mg/m<sup>3</sup> </td></tr> <tr> <td>Singapore </td> <td>Confirmed human carcinogen </td></tr> <tr> <td><a href="/wiki/South_Korea" title="South Korea">South Korea</a> </td> <td>TWA 0.01&#160;mg/m<sup>3</sup><sup id="cite_ref-220" class="reference"><a href="#cite_note-220"><span class="cite-bracket">&#91;</span>220<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td>Sweden </td> <td>TWA 0.01&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Thailand" title="Thailand">Thailand</a> </td> <td>TWA 0.5&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Turkey" title="Turkey">Turkey</a> </td> <td>TWA 0.5&#160;mg/m<sup>3</sup> </td></tr> <tr> <td>United Kingdom </td> <td>TWA 0.1&#160;mg/m<sup>3</sup> </td></tr> <tr> <td>United States </td> <td>TWA 0.01&#160;mg/m<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Vietnam" title="Vietnam">Vietnam</a> </td> <td>Confirmed human carcinogen </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="Ecotoxicity">Ecotoxicity</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=37" title="Edit section: Ecotoxicity"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic is <a href="/wiki/Bioaccumulation" title="Bioaccumulation">bioaccumulative</a> in many organisms, marine species in particular, but it does not appear to biomagnify significantly in food webs.<sup id="cite_ref-221" class="reference"><a href="#cite_note-221"><span class="cite-bracket">&#91;</span>221<span class="cite-bracket">&#93;</span></a></sup> In polluted areas, plant growth may be affected by root uptake of arsenate, which is a phosphate analog and therefore readily transported in plant tissues and cells. In polluted areas, uptake of the more toxic arsenite ion (found more particularly in reducing conditions) is likely in poorly-drained soils. </p> <div class="mw-heading mw-heading3"><h3 id="Toxicity_in_animals">Toxicity in animals</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=38" title="Edit section: Toxicity in animals"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable"> <tbody><tr> <th>Compound </th> <th>Animal </th> <th>LD<sub>50</sub> </th> <th>Route </th></tr> <tr> <td>Arsenic </td> <td>Rat </td> <td>763&#160;mg/kg </td> <td>oral </td></tr> <tr> <td>Arsenic </td> <td>Mouse </td> <td>145&#160;mg/kg </td> <td>oral </td></tr> <tr> <td><a href="/wiki/Calcium_arsenate" title="Calcium arsenate">Calcium arsenate</a> </td> <td>Rat </td> <td>20&#160;mg/kg </td> <td>oral </td></tr> <tr> <td>Calcium arsenate </td> <td>Mouse </td> <td>794&#160;mg/kg </td> <td>oral </td></tr> <tr> <td>Calcium arsenate </td> <td>Rabbit </td> <td>50&#160;mg/kg </td> <td>oral </td></tr> <tr> <td>Calcium arsenate </td> <td>Dog </td> <td>38&#160;mg/kg </td> <td>oral </td></tr> <tr> <td><a href="/wiki/Lead_arsenate" class="mw-redirect" title="Lead arsenate">Lead arsenate</a> </td> <td>Rabbit </td> <td>75&#160;mg/kg </td> <td>oral </td></tr></tbody></table> <table class="wikitable"> <tbody><tr> <th>Compound </th> <th>Animal </th> <th>LD<sub>50</sub><sup id="cite_ref-Hughes_222-0" class="reference"><a href="#cite_note-Hughes-222"><span class="cite-bracket">&#91;</span>222<span class="cite-bracket">&#93;</span></a></sup> </th> <th>Route </th></tr> <tr> <td>Arsenic trioxide (As(III)) </td> <td>Mouse </td> <td>26&#160;mg/kg </td> <td>oral </td></tr> <tr> <td>Arsenite (As(III)) </td> <td>Mouse </td> <td>8&#160;mg/kg </td> <td>im </td></tr> <tr> <td>Arsenate (As(V)) </td> <td>Mouse </td> <td>21&#160;mg/kg </td> <td>im </td></tr> <tr> <td>MMA (As(III)) </td> <td>Hamster </td> <td>2&#160;mg/kg </td> <td>ip </td></tr> <tr> <td>MMA (As(V)) </td> <td>Mouse </td> <td>916&#160;mg/kg </td> <td>oral </td></tr> <tr> <td>DMA (As(V)) </td> <td>Mouse </td> <td>648&#160;mg/kg </td> <td>oral </td></tr> <tr> <td colspan="4">im = injected intramuscularly <p>ip = administered intraperitoneally </p> </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="Biological_mechanism">Biological mechanism</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=39" title="Edit section: Biological mechanism"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Arsenic's toxicity comes from the affinity of arsenic(III) oxides for <a href="/wiki/Thiol" title="Thiol">thiols</a>. Thiols, in the form of <a href="/wiki/Cysteine" title="Cysteine">cysteine</a> residues and <a href="/wiki/Cofactor_(biochemistry)" title="Cofactor (biochemistry)">cofactors</a> such as <a href="/wiki/Lipoic_acid" title="Lipoic acid">lipoic acid</a> and <a href="/wiki/Coenzyme_A" title="Coenzyme A">coenzyme A</a>, are situated at the active sites of many important <a href="/wiki/Enzyme" title="Enzyme">enzymes</a>.<sup id="cite_ref-Ullmann_15-4" class="reference"><a href="#cite_note-Ullmann-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> </p><p>Arsenic disrupts <a href="/wiki/Adenosine_triphosphate" title="Adenosine triphosphate">ATP</a> production through several mechanisms. At the level of the <a href="/wiki/Citric_acid_cycle" title="Citric acid cycle">citric acid cycle</a>, arsenic inhibits <a href="/wiki/Lipoic_acid" title="Lipoic acid">lipoic acid</a>, which is a cofactor for <a href="/wiki/Pyruvate_dehydrogenase" title="Pyruvate dehydrogenase">pyruvate dehydrogenase</a>. By competing with phosphate, arsenate uncouples <a href="/wiki/Oxidative_phosphorylation" title="Oxidative phosphorylation">oxidative phosphorylation</a>, thus inhibiting energy-linked reduction of <a href="/wiki/Nicotinamide_adenine_dinucleotide" title="Nicotinamide adenine dinucleotide">NAD+</a>, mitochondrial respiration and ATP synthesis. Hydrogen peroxide production is also increased, which, it is speculated, has potential to form reactive oxygen species and oxidative stress. These metabolic interferences lead to death from multi-system <a href="/wiki/Organ_failure" class="mw-redirect" title="Organ failure">organ failure</a>. The organ failure is presumed to be from <a href="/wiki/Necrotic" class="mw-redirect" title="Necrotic">necrotic</a> cell death, not <a href="/wiki/Apoptosis" title="Apoptosis">apoptosis</a>, since energy reserves have been too depleted for apoptosis to occur.<sup id="cite_ref-Hughes_222-1" class="reference"><a href="#cite_note-Hughes-222"><span class="cite-bracket">&#91;</span>222<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Exposure_risks_and_remediation">Exposure risks and remediation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=40" title="Edit section: Exposure risks and remediation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Occupational exposure and <a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">arsenic poisoning</a> may occur in persons working in industries involving the use of inorganic arsenic and its compounds, such as wood preservation, glass production, nonferrous metal alloys, and electronic semiconductor manufacturing. Inorganic arsenic is also found in coke oven emissions associated with the smelter industry.<sup id="cite_ref-223" class="reference"><a href="#cite_note-223"><span class="cite-bracket">&#91;</span>223<span class="cite-bracket">&#93;</span></a></sup> </p><p>The conversion between As(III) and As(V) is a large factor in arsenic environmental contamination. According to Croal, Gralnick, Malasarn and Newman, "[the] understanding [of] what stimulates As(III) oxidation and/or limits As(V) reduction is relevant for <a href="/wiki/Bioremediation" title="Bioremediation">bioremediation</a> of contaminated sites (Croal). The study of chemolithoautotrophic As(III) oxidizers and the heterotrophic As(V) reducers can help the understanding of the oxidation and/or reduction of arsenic.<sup id="cite_ref-224" class="reference"><a href="#cite_note-224"><span class="cite-bracket">&#91;</span>224<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Treatment">Treatment</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=41" title="Edit section: Treatment"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Treatment of chronic arsenic poisoning is possible. British anti-lewisite (<a href="/wiki/Dimercaprol" title="Dimercaprol">dimercaprol</a>) is prescribed in doses of 5&#160;mg/kg up to 300&#160;mg every 4&#160;hours for the first day, then every 6&#160;hours for the second day, and finally every 8&#160;hours for 8 additional days.<sup id="cite_ref-225" class="reference"><a href="#cite_note-225"><span class="cite-bracket">&#91;</span>225<span class="cite-bracket">&#93;</span></a></sup> However the USA's <a href="/wiki/Agency_for_Toxic_Substances_and_Disease_Registry" title="Agency for Toxic Substances and Disease Registry">Agency for Toxic Substances and Disease Registry</a> (ATSDR) states that the long-term effects of arsenic exposure cannot be predicted.<sup id="cite_ref-atsdr.cdc.gov_134-1" class="reference"><a href="#cite_note-atsdr.cdc.gov-134"><span class="cite-bracket">&#91;</span>134<span class="cite-bracket">&#93;</span></a></sup> Blood, urine, hair, and nails may be tested for arsenic; however, these tests cannot foresee possible health outcomes from the exposure.<sup id="cite_ref-atsdr.cdc.gov_134-2" class="reference"><a href="#cite_note-atsdr.cdc.gov-134"><span class="cite-bracket">&#91;</span>134<span class="cite-bracket">&#93;</span></a></sup> Long-term exposure and consequent excretion through urine has been linked to <a href="/wiki/Bladder_cancer" title="Bladder cancer">bladder</a> and <a href="/wiki/Kidney_cancer" title="Kidney cancer">kidney cancer</a> in addition to cancer of the liver, prostate, skin, lungs, and <a href="/wiki/Nasal_cavity" title="Nasal cavity">nasal cavity</a>.<sup id="cite_ref-226" class="reference"><a href="#cite_note-226"><span class="cite-bracket">&#91;</span>226<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=42" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Aqua_Tofana" title="Aqua Tofana">Aqua Tofana</a></li> <li><i><a href="/wiki/Arsenic_and_Old_Lace_(disambiguation)" class="mw-redirect mw-disambig" title="Arsenic and Old Lace (disambiguation)">Arsenic and Old Lace</a></i></li> <li><a href="/wiki/Grainger_challenge" title="Grainger challenge">Grainger challenge</a></li> <li><a href="/wiki/Hypothetical_types_of_biochemistry" title="Hypothetical types of biochemistry">Hypothetical types of biochemistry</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=43" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-CIAAW-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-CIAAW_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.ciaaw.org/arsenic.htm">"Standard Atomic Weights: Arsenic"</a>. <a href="/wiki/Commission_on_Isotopic_Abundances_and_Atomic_Weights" title="Commission on Isotopic Abundances and Atomic Weights">CIAAW</a>. 2013.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Standard+Atomic+Weights%3A+Arsenic&amp;rft.pub=CIAAW&amp;rft.date=2013&amp;rft_id=https%3A%2F%2Fwww.ciaaw.org%2Farsenic.htm&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-CIAAW2021-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-CIAAW2021_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFProhaskaIrrgeherBenefieldBöhlke2022" class="citation journal cs1">Prohaska T, Irrgeher J, Benefield J, Böhlke JK, Chesson LA, Coplen TB, Ding T, Dunn PJ, Gröning M, Holden NE, Meijer HA (4 May 2022). <a rel="nofollow" class="external text" href="https://www.degruyter.com/document/doi/10.1515/pac-2019-0603/html">"Standard atomic weights of the elements 2021 (IUPAC Technical Report)"</a>. <i>Pure and Applied Chemistry</i>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1515%2Fpac-2019-0603">10.1515/pac-2019-0603</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a>&#160;<a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1365-3075">1365-3075</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Pure+and+Applied+Chemistry&amp;rft.atitle=Standard+atomic+weights+of+the+elements+2021+%28IUPAC+Technical+Report%29&amp;rft.date=2022-05-04&amp;rft_id=info%3Adoi%2F10.1515%2Fpac-2019-0603&amp;rft.issn=1365-3075&amp;rft.aulast=Prohaska&amp;rft.aufirst=Thomas&amp;rft.au=Irrgeher%2C+Johanna&amp;rft.au=Benefield%2C+Jacqueline&amp;rft.au=B%C3%B6hlke%2C+John+K.&amp;rft.au=Chesson%2C+Lesley+A.&amp;rft.au=Coplen%2C+Tyler+B.&amp;rft.au=Ding%2C+Tiping&amp;rft.au=Dunn%2C+Philip+J.+H.&amp;rft.au=Gr%C3%B6ning%2C+Manfred&amp;rft.au=Holden%2C+Norman+E.&amp;rft.au=Meijer%2C+Harro+A.+J.&amp;rft_id=https%3A%2F%2Fwww.degruyter.com%2Fdocument%2Fdoi%2F10.1515%2Fpac-2019-0603%2Fhtml&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-Arblaster_2018-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Arblaster_2018_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Arblaster_2018_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFArblaster2018" class="citation book cs1">Arblaster JW (2018). <i>Selected Values of the Crystallographic Properties of Elements</i>. Materials Park, Ohio: ASM International. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-62708-155-9" title="Special:BookSources/978-1-62708-155-9"><bdi>978-1-62708-155-9</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Selected+Values+of+the+Crystallographic+Properties+of+Elements&amp;rft.place=Materials+Park%2C+Ohio&amp;rft.pub=ASM+International&amp;rft.date=2018&amp;rft.isbn=978-1-62708-155-9&amp;rft.aulast=Arblaster&amp;rft.aufirst=John+W.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-Gokcen1989-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-Gokcen1989_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Gokcen1989_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Gokcen1989_4-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGokcen,_N._A1989" class="citation journal cs1">Gokcen, N. A (1989). "The As (arsenic) system". <i>Bull. Alloy Phase Diagrams</i>. <b>10</b>: <span class="nowrap">11–</span>22. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1007%2FBF02882166">10.1007/BF02882166</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Bull.+Alloy+Phase+Diagrams&amp;rft.atitle=The+As+%28arsenic%29+system&amp;rft.volume=10&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E11-%3C%2Fspan%3E22&amp;rft.date=1989&amp;rft_id=info%3Adoi%2F10.1007%2FBF02882166&amp;rft.au=Gokcen%2C+N.+A&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">As(−2) has been observed in CaAs; see <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHollemanWiberg,_EgonWiberg,_Nils2008" class="citation book cs1 cs1-prop-foreign-lang-source">Holleman AF, Wiberg, Egon, Wiberg, Nils (2008). <i>Lehrbuch der Anorganischen Chemie</i> (in German) (102&#160;ed.). Walter de Gruyter. p.&#160;829. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/9783110206845" title="Special:BookSources/9783110206845"><bdi>9783110206845</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Lehrbuch+der+Anorganischen+Chemie&amp;rft.pages=829&amp;rft.edition=102&amp;rft.pub=Walter+de+Gruyter&amp;rft.date=2008&amp;rft.isbn=9783110206845&amp;rft.aulast=Holleman&amp;rft.aufirst=Arnold+F.&amp;rft.au=Wiberg%2C+Egon&amp;rft.au=Wiberg%2C+Nils&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text">As(−1) has been observed in LiAs; see <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFReinhard_Nesper1990" class="citation journal cs1">Reinhard Nesper (1990). "Structure and chemical bonding in zintl-phases containing lithium". <i>Progress in Solid State Chemistry</i> (1): <span class="nowrap">1–</span>45. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2F0079-6786%2890%2990006-2">10.1016/0079-6786(90)90006-2</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Progress+in+Solid+State+Chemistry&amp;rft.atitle=Structure+and+chemical+bonding+in+zintl-phases+containing+lithium&amp;rft.issue=1&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E1-%3C%2Fspan%3E45&amp;rft.date=1990&amp;rft_id=info%3Adoi%2F10.1016%2F0079-6786%2890%2990006-2&amp;rft.au=Reinhard+Nesper&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAbrahamWangXieWei2010" class="citation journal cs1">Abraham MY, Wang Y, Xie Y, Wei P, Shaefer III HF, Schleyer Pv, Robinson GH (2010). "Carbene Stabilization of Diarsenic: From Hypervalency to Allotropy". <i>Chemistry: A European Journal</i>. <b>16</b> (2): <span class="nowrap">432–</span>5. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fchem.200902840">10.1002/chem.200902840</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/19937872">19937872</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Chemistry%3A+A+European+Journal&amp;rft.atitle=Carbene+Stabilization+of+Diarsenic%3A+From+Hypervalency+to+Allotropy&amp;rft.volume=16&amp;rft.issue=2&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E432-%3C%2Fspan%3E5&amp;rft.date=2010&amp;rft_id=info%3Adoi%2F10.1002%2Fchem.200902840&amp;rft_id=info%3Apmid%2F19937872&amp;rft.aulast=Abraham&amp;rft.aufirst=Mariham+Y.&amp;rft.au=Wang%2C+Yuzhong&amp;rft.au=Xie%2C+Yaoming&amp;rft.au=Wei%2C+Pingrong&amp;rft.au=Shaefer+III%2C+Henry+F.&amp;rft.au=Schleyer%2C+P.+von+R.&amp;rft.au=Robinson%2C+Gregory+H.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEllisMacDonald2004" class="citation journal cs1">Ellis BD, MacDonald CL (2004). "Stabilized Arsenic(I) Iodide: A Ready Source of Arsenic Iodide Fragments and a Useful Reagent for the Generation of Clusters". <i>Inorganic Chemistry</i>. <b>43</b> (19): <span class="nowrap">5981–</span>6. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fic049281s">10.1021/ic049281s</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/15360247">15360247</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Inorganic+Chemistry&amp;rft.atitle=Stabilized+Arsenic%28I%29+Iodide%3A+A+Ready+Source+of+Arsenic+Iodide+Fragments+and+a+Useful+Reagent+for+the+Generation+of+Clusters&amp;rft.volume=43&amp;rft.issue=19&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E5981-%3C%2Fspan%3E6&amp;rft.date=2004&amp;rft_id=info%3Adoi%2F10.1021%2Fic049281s&amp;rft_id=info%3Apmid%2F15360247&amp;rft.aulast=Ellis&amp;rft.aufirst=Bobby+D.&amp;rft.au=MacDonald%2C+Charles+L.+B.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-GE28-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-GE28_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGreenwoodEarnshaw1997" class="citation book cs1"><a href="/wiki/Norman_Greenwood" title="Norman Greenwood">Greenwood NN</a>, Earnshaw A (1997). <i>Chemistry of the Elements</i> (2nd&#160;ed.). <a href="/wiki/Butterworth-Heinemann" title="Butterworth-Heinemann">Butterworth-Heinemann</a>. p.&#160;28. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-08-037941-8" title="Special:BookSources/978-0-08-037941-8"><bdi>978-0-08-037941-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Chemistry+of+the+Elements&amp;rft.pages=28&amp;rft.edition=2nd&amp;rft.pub=Butterworth-Heinemann&amp;rft.date=1997&amp;rft.isbn=978-0-08-037941-8&amp;rft.aulast=Greenwood&amp;rft.aufirst=Norman+N.&amp;rft.au=Earnshaw%2C+Alan&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text">As(IV) has been observed in <a href="/w/index.php?title=Arsenic(IV)_hydroxide&amp;action=edit&amp;redlink=1" class="new" title="Arsenic(IV) hydroxide (page does not exist)">arsenic(IV) hydroxide</a> (As(OH)<sub>4</sub>) and <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">HAsO<sup class="template-chem2-sup">−</sup></span>; see <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKläningBielskiSehested1989" class="citation journal cs1">Kläning UK, Bielski BH, Sehested K (1989). "Arsenic(IV). A pulse-radiolysis study". <i>Inorganic Chemistry</i>. <b>28</b> (14): <span class="nowrap">2717–</span>24. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fic00313a007">10.1021/ic00313a007</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Inorganic+Chemistry&amp;rft.atitle=Arsenic%28IV%29.+A+pulse-radiolysis+study&amp;rft.volume=28&amp;rft.issue=14&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E2717-%3C%2Fspan%3E24&amp;rft.date=1989&amp;rft_id=info%3Adoi%2F10.1021%2Fic00313a007&amp;rft.aulast=Kl%C3%A4ning&amp;rft.aufirst=Ulrik+K.&amp;rft.au=Bielski%2C+Benon+H.+J.&amp;rft.au=Sehested%2C+K.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCverna,_Fran2002" class="citation book cs1">Cverna, Fran (2002). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=qvrq96gJFxIC&amp;pg=PA8"><i>ASM Ready Reference: Thermal properties of metals</i></a>. 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"Arsenic neurotoxicity – a review". <i>Human &amp; Experimental Toxicology</i>. <b>26</b> (10): <span class="nowrap">823–</span>832. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2007HETox..26..823V">2007HETox..26..823V</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1177%2F0960327107084539">10.1177/0960327107084539</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/18025055">18025055</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a>&#160;<a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:24138885">24138885</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Human+%26+Experimental+Toxicology&amp;rft.atitle=Arsenic+neurotoxicity+%E2%80%93+a+review&amp;rft.volume=26&amp;rft.issue=10&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E823-%3C%2Fspan%3E832&amp;rft.date=2007&amp;rft_id=info%3Adoi%2F10.1177%2F0960327107084539&amp;rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A24138885%23id-name%3DS2CID&amp;rft_id=info%3Apmid%2F18025055&amp;rft_id=info%3Abibcode%2F2007HETox..26..823V&amp;rft.aulast=Vahidnia&amp;rft.aufirst=A.&amp;rft.au=Van+Der+Voet%2C+G.+B.&amp;rft.au=De+Wolff%2C+F.+A.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-63"><span class="mw-cite-backlink"><b><a href="#cite_ref-63">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKethaGarg2020" class="citation book cs1">Ketha H, Garg U (2020). "An introduction to clinical and forensic toxicology". <i>Toxicology Cases for the Clinical and Forensic Laboratory</i>. pp.&#160;<span class="nowrap">3–</span>6. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2FB978-0-12-815846-3.00001-6">10.1016/B978-0-12-815846-3.00001-6</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-12-815846-3" title="Special:BookSources/978-0-12-815846-3"><bdi>978-0-12-815846-3</bdi></a>. <q>Arsenic was nicknamed 'the inheritance powder' as it was commonly used to poison family members for a fortune in the Renaissance era.</q></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=An+introduction+to+clinical+and+forensic+toxicology&amp;rft.btitle=Toxicology+Cases+for+the+Clinical+and+Forensic+Laboratory&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E3-%3C%2Fspan%3E6&amp;rft.date=2020&amp;rft_id=info%3Adoi%2F10.1016%2FB978-0-12-815846-3.00001-6&amp;rft.isbn=978-0-12-815846-3&amp;rft.aulast=Ketha&amp;rft.aufirst=Hema&amp;rft.au=Garg%2C+Uttam&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-64"><span class="mw-cite-backlink"><b><a href="#cite_ref-64">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLechtman1996" class="citation journal cs1">Lechtman H (1996). "Arsenic Bronze: Dirty Copper or Chosen Alloy? A View from the Americas". <i>Journal of Field Archaeology</i>. <b>23</b> (4): <span class="nowrap">477–</span>514. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.2307%2F530550">10.2307/530550</a>. <a href="/wiki/JSTOR_(identifier)" class="mw-redirect" title="JSTOR (identifier)">JSTOR</a>&#160;<a rel="nofollow" class="external text" href="https://www.jstor.org/stable/530550">530550</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Journal+of+Field+Archaeology&amp;rft.atitle=Arsenic+Bronze%3A+Dirty+Copper+or+Chosen+Alloy%3F+A+View+from+the+Americas&amp;rft.volume=23&amp;rft.issue=4&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E477-%3C%2Fspan%3E514&amp;rft.date=1996&amp;rft_id=info%3Adoi%2F10.2307%2F530550&amp;rft_id=https%3A%2F%2Fwww.jstor.org%2Fstable%2F530550%23id-name%3DJSTOR&amp;rft.aulast=Lechtman&amp;rft.aufirst=H.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-65"><span class="mw-cite-backlink"><b><a href="#cite_ref-65">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCharles,_J._A.1967" class="citation journal cs1">Charles, J. A. (1967). 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"We find in his writings [...] preparation of various substances (e.g., basic lead carbonatic, arsenic and antimony from their sulphides)."</span> </li> <li id="cite_note-BuildingBlocks451-3-67"><span class="mw-cite-backlink"><b><a href="#cite_ref-BuildingBlocks451-3_67-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEmsley2001" class="citation book cs1">Emsley J (2001). <i>Nature's Building Blocks: An A-Z Guide to the Elements</i>. Oxford: <a href="/wiki/Oxford_University_Press" title="Oxford University Press">Oxford University Press</a>. pp.&#160;43, 513, 529. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-850341-5" title="Special:BookSources/978-0-19-850341-5"><bdi>978-0-19-850341-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Nature%27s+Building+Blocks%3A+An+A-Z+Guide+to+the+Elements&amp;rft.place=Oxford&amp;rft.pages=43%2C+513%2C+529&amp;rft.pub=Oxford+University+Press&amp;rft.date=2001&amp;rft.isbn=978-0-19-850341-5&amp;rft.aulast=Emsley&amp;rft.aufirst=John&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-68"><span class="mw-cite-backlink"><b><a href="#cite_ref-68">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFourcroy1804" class="citation book cs1"><a href="/wiki/Antoine-Fran%C3%A7ois_de_Fourcroy" title="Antoine-François de Fourcroy">Fourcroy AF</a> (1804). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=PTgwAAAAYAAJ&amp;pg=PA84"><i>A general system of chemical knowledge, and its application to the phenomena of nature and art</i></a>. pp.&#160;84–.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=A+general+system+of+chemical+knowledge%2C+and+its+application+to+the+phenomena+of+nature+and+art&amp;rft.pages=84-&amp;rft.date=1804&amp;rft.aulast=Fourcroy&amp;rft.aufirst=Antoine-Fran%C3%A7ois&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DPTgwAAAAYAAJ%26pg%3DPA84&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-69"><span class="mw-cite-backlink"><b><a href="#cite_ref-69">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSeyferth2001" class="citation journal cs1">Seyferth D (2001). <a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fom0101947">"Cadet's Fuming Arsenical Liquid and the Cacodyl Compounds of Bunsen"</a>. <i>Organometallics</i>. <b>20</b> (8): <span class="nowrap">1488–</span>1498. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fom0101947">10.1021/om0101947</a></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Organometallics&amp;rft.atitle=Cadet%27s+Fuming+Arsenical+Liquid+and+the+Cacodyl+Compounds+of+Bunsen&amp;rft.volume=20&amp;rft.issue=8&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E1488-%3C%2Fspan%3E1498&amp;rft.date=2001&amp;rft_id=info%3Adoi%2F10.1021%2Fom0101947&amp;rft.aulast=Seyferth&amp;rft.aufirst=Dietmar&amp;rft_id=https%3A%2F%2Fdoi.org%2F10.1021%252Fom0101947&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-70"><span class="mw-cite-backlink"><b><a href="#cite_ref-70">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFould1898" class="citation news cs1 cs1-prop-location-test">Fould HS (13 February 1898). Written at New York. "Display Ad 48 – no Title" &#91;"LADIES" in large print at the top; advertises "Dr. Campbell's Safe Arsenic Complexion Wafers and Fould's Medicated Arsenic Complexion Soap"&#93;. <i><a href="/wiki/The_Washington_Post" title="The Washington Post">The Washington Post</a></i>. Washington, DC. p.&#160;28. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ProQuest" title="ProQuest">ProQuest</a>&#160;<a rel="nofollow" class="external text" href="https://www.proquest.com/docview/143995174">143995174</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=The+Washington+Post&amp;rft.atitle=Display+Ad+48+%E2%80%93+no+Title&amp;rft.pages=28&amp;rft.date=1898-02-13&amp;rft.aulast=Fould&amp;rft.aufirst=H.+S.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-Food-71"><span class="mw-cite-backlink"><b><a href="#cite_ref-Food_71-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFTurner1999" class="citation journal cs1">Turner A (1999). "Viewpoint: the story so far: An overview of developments in UK food regulation and associated advisory committees". <i>British Food Journal</i>. <b>101</b> (4): <span class="nowrap">274–</span>283. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1108%2F00070709910272141">10.1108/00070709910272141</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=British+Food+Journal&amp;rft.atitle=Viewpoint%3A+the+story+so+far%3A+An+overview+of+developments+in+UK+food+regulation+and+associated+advisory+committees&amp;rft.volume=101&amp;rft.issue=4&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E274-%3C%2Fspan%3E283&amp;rft.date=1999&amp;rft_id=info%3Adoi%2F10.1108%2F00070709910272141&amp;rft.aulast=Turner&amp;rft.aufirst=Alan&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-72"><span class="mw-cite-backlink"><b><a href="#cite_ref-72">^</a></b></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWhorton2010" class="citation book cs1">Whorton JC (28 January 2010) [2010]. "Walls of Death". <a rel="nofollow" class="external text" href="https://books.google.com/books?id=YnVNX3drptkC"><i>The Arsenic Century: How Victorian Britain was Poisoned at Home, Work, and Play</i></a> (reprint&#160;ed.). Oxford: Oxford University Press. p.&#160;205. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-162343-1" title="Special:BookSources/978-0-19-162343-1"><bdi>978-0-19-162343-1</bdi></a><span class="reference-accessdate">. Retrieved <span class="nowrap">1 October</span> 2023</span>. <q>At first, green papers were coloured with the traditional mineral pigment verdigris or buy mixing blues and yellows of plant origin. But once Scheele's green began to be produced in quantity, it was adopted as an improvement over the old colours and became a common constituent in wallpaper by 1800.</q></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Walls+of+Death&amp;rft.btitle=The+Arsenic+Century%3A+How+Victorian+Britain+was+Poisoned+at+Home%2C+Work%2C+and+Play&amp;rft.place=Oxford&amp;rft.pages=205&amp;rft.edition=reprint&amp;rft.pub=Oxford+University+Press&amp;rft.date=2010-01-28&amp;rft.isbn=978-0-19-162343-1&amp;rft.aulast=Whorton&amp;rft.aufirst=James+C.&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DYnVNX3drptkC&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-73"><span class="mw-cite-backlink"><b><a href="#cite_ref-73">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHawksley2016" class="citation book cs1">Hawksley L (2016). <i>Bitten by Witch Fever: Wallpaper &amp; Arsenic in the Victorian Home</i>. New York: Thames &amp; Hudson.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Bitten+by+Witch+Fever%3A+Wallpaper+%26+Arsenic+in+the+Victorian+Home&amp;rft.place=New+York&amp;rft.pub=Thames+%26+Hudson&amp;rft.date=2016&amp;rft.aulast=Hawksley&amp;rft.aufirst=Lucinda&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-74"><span class="mw-cite-backlink"><b><a href="#cite_ref-74">^</a></b></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCullen2008" class="citation book cs1">Cullen WR (2008). "4.7.1 Was it the Arsenic in the Wallpaper?". <a rel="nofollow" class="external text" href="https://books.google.com/books?id=yyaTdY4UGLMC"><i>Is Arsenic an Aphrodisiac?: The Sociochemistry of an Element</i></a>. 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Retrieved <span class="nowrap">1 October</span> 2023</span>. <q>The wallpaper-as-arsenic-source of poison made the headlines in 1982 [...] when analysis of a sample of wallpaper from the living room in Longwood, Napoleon's residence on St. Helena, revealed arsenic concentrations of about 0.12 g/m<sup>2</sup>.</q></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=4.7.1+Was+it+the+Arsenic+in+the+Wallpaper%3F&amp;rft.btitle=Is+Arsenic+an+Aphrodisiac%3F%3A+The+Sociochemistry+of+an+Element&amp;rft.pages=146&amp;rft.pub=Royal+Society+of+Chemistry&amp;rft.date=2008&amp;rft.isbn=978-0-85404-363-7&amp;rft.aulast=Cullen&amp;rft.aufirst=William+R.&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DyyaTdY4UGLMC&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-75"><span class="mw-cite-backlink"><b><a href="#cite_ref-75">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://cameochemicals.noaa.gov/chemical/3779">"London purple"</a>. 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The Agency for Toxic Substances and Disease Registry (2009).</span> </li> <li id="cite_note-135"><span class="mw-cite-backlink"><b><a href="#cite_ref-135">^</a></b></span> <span class="reference-text">Archived at <a rel="nofollow" class="external text" href="https://ghostarchive.org/varchive/youtube/20211205/MvxnXOoFl20">Ghostarchive</a> and the <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190919033145/https://www.youtube.com/watch?v=MvxnXOoFl20&amp;gl=US&amp;hl=en">Wayback Machine</a>: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=MvxnXOoFl20">"How Victorians Were Poisoned By Their Own Homes | Hidden Killers | Absolute Victory"</a>. <i>YouTube</i>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=YouTube&amp;rft.atitle=How+Victorians+Were+Poisoned+By+Their+Own+Homes+%7C+Hidden+Killers+%7C+Absolute+Victory&amp;rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DMvxnXOoFl20&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-136"><span class="mw-cite-backlink"><b><a href="#cite_ref-136">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFendrichVan_EyndeStasinopoulosRigby2024" class="citation journal cs1">Fendrich AN, Van Eynde E, Stasinopoulos DM, Rigby RA, Mezquita FY, Panagos P (1 March 2024). <a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.envint.2024.108544">"Modeling arsenic in European topsoils with a coupled semiparametric (GAMLSS-RF) model for censored data"</a>. <i>Environment International</i>. <b>185</b>: 108544. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2024EnInt.18508544F">2024EnInt.18508544F</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.envint.2024.108544">10.1016/j.envint.2024.108544</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/38452467">38452467</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Environment+International&amp;rft.atitle=Modeling+arsenic+in+European+topsoils+with+a+coupled+semiparametric+%28GAMLSS-RF%29+model+for+censored+data&amp;rft.volume=185&amp;rft.pages=108544&amp;rft.date=2024-03-01&amp;rft_id=info%3Apmid%2F38452467&amp;rft_id=info%3Adoi%2F10.1016%2Fj.envint.2024.108544&amp;rft_id=info%3Abibcode%2F2024EnInt.18508544F&amp;rft.aulast=Fendrich&amp;rft.aufirst=Arthur+Nicolaus&amp;rft.au=Van+Eynde%2C+Elise&amp;rft.au=Stasinopoulos%2C+Dimitrios+M.&amp;rft.au=Rigby%2C+Robert+A.&amp;rft.au=Mezquita%2C+Felipe+Yunta&amp;rft.au=Panagos%2C+Panos&amp;rft_id=https%3A%2F%2Fdoi.org%2F10.1016%252Fj.envint.2024.108544&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></span> </li> <li id="cite_note-137"><span class="mw-cite-backlink"><b><a href="#cite_ref-137">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMeharg2005" class="citation book cs1">Meharg A (2005). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/venomousearthhow00meha"><i>Venomous Earth – How Arsenic Caused The World's Worst Mass Poisoning</i></a></span>. 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The US Agency for Toxic Substances and Disease Registry.</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliography">Bibliography</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=44" title="Edit section: Bibliography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEmsley2011" class="citation book cs1">Emsley J (2011). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=j-Xu07p3cKwC">"Arsenic"</a>. <i>Nature's Building Blocks: An A–Z Guide to the Elements</i>. Oxford, England: Oxford University Press. pp.&#160;<span class="nowrap">47–</span>55. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-960563-7" title="Special:BookSources/978-0-19-960563-7"><bdi>978-0-19-960563-7</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Arsenic&amp;rft.btitle=Nature%27s+Building+Blocks%3A+An+A%E2%80%93Z+Guide+to+the+Elements&amp;rft.place=Oxford%2C+England&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E47-%3C%2Fspan%3E55&amp;rft.pub=Oxford+University+Press&amp;rft.date=2011&amp;rft.isbn=978-0-19-960563-7&amp;rft.aulast=Emsley&amp;rft.aufirst=John&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dj-Xu07p3cKwC&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGreenwoodEarnshaw1997" class="citation book cs1"><a href="/wiki/Norman_Greenwood" title="Norman Greenwood">Greenwood NN</a>, Earnshaw A (1997). <i>Chemistry of the Elements</i> (2nd&#160;ed.). <a href="/wiki/Butterworth-Heinemann" title="Butterworth-Heinemann">Butterworth-Heinemann</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-08-037941-8" title="Special:BookSources/978-0-08-037941-8"><bdi>978-0-08-037941-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Chemistry+of+the+Elements&amp;rft.edition=2nd&amp;rft.pub=Butterworth-Heinemann&amp;rft.date=1997&amp;rft.isbn=978-0-08-037941-8&amp;rft.aulast=Greenwood&amp;rft.aufirst=Norman+N.&amp;rft.au=Earnshaw%2C+Alan&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRieuwerts,_John2015" class="citation book cs1">Rieuwerts, John (2015). <i>The Elements of Environmental Pollution</i>. Abingdon and New York: Routledge. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-415-85920-2" title="Special:BookSources/978-0-415-85920-2"><bdi>978-0-415-85920-2</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Elements+of+Environmental+Pollution&amp;rft.pub=Abingdon+and+New+York%3A+Routledge&amp;rft.date=2015&amp;rft.isbn=978-0-415-85920-2&amp;rft.au=Rieuwerts%2C+John&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=45" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWhorton2011" class="citation book cs1">Whorton JG (2011). <i>The Arsenic Century</i>. Oxford University Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-960599-6" title="Special:BookSources/978-0-19-960599-6"><bdi>978-0-19-960599-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Arsenic+Century&amp;rft.pub=Oxford+University+Press&amp;rft.date=2011&amp;rft.isbn=978-0-19-960599-6&amp;rft.aulast=Whorton&amp;rft.aufirst=James+G.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AArsenic" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Arsenic&amp;action=edit&amp;section=46" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style 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class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/60px-Wiktionary-logo-en-v2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/80px-Wiktionary-logo-en-v2.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></div> <div class="side-box-text plainlist">Look up <i><b><a href="https://en.wiktionary.org/wiki/arsenic" class="extiw" title="wiktionary:arsenic">arsenic</a></b></i> in Wiktionary, the free dictionary.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="https://www.who.int/news-room/fact-sheets/detail/arsenic">WHO fact sheet on arsenic</a></li> <li><a rel="nofollow" class="external text" href="https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/arsenic">Arsenic</a> Cancer Causing Substances, U.S. National Cancer Institute.</li> <li><a rel="nofollow" class="external text" href="http://ctdbase.org/detail.go?type=chem&amp;acc=D001151">CTD's Arsenic page</a> and <a rel="nofollow" class="external text" href="http://ctdbase.org/detail.go?type=chem&amp;acc=D001152">CTD's Arsenicals page</a> from the <a href="/wiki/Comparative_Toxicogenomics_Database" title="Comparative Toxicogenomics Database">Comparative Toxicogenomics Database</a></li> <li><a rel="nofollow" class="external text" href="https://www.clu-in.org/contaminantfocus/default.focus/sec/arsenic/cat/Overview/">Contaminant Focus: Arsenic</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090901131448/http://www.clu-in.org/contaminantfocus/default.focus/sec/arsenic/cat/Overview/">Archived</a> 1 September 2009 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> by the <a href="/wiki/United_States_Environmental_Protection_Agency" title="United States Environmental Protection Agency">EPA</a>.</li> <li><a rel="nofollow" class="external text" href="http://www.inchem.org/documents/ehc/ehc/ehc224.htm">Environmental Health Criteria for Arsenic and Arsenic Compounds, 2001</a> by the <a href="/wiki/World_Health_Organization" title="World Health Organization">WHO</a>.</li> <li><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/topics/arsenic/">National Institute for Occupational Safety and Health – Arsenic Page</a></li></ul> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output 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.navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Periodic_table18" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Periodic_table_(navbox)" title="Template:Periodic table (navbox)"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Periodic_table_(navbox)" title="Template talk:Periodic table (navbox)"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Periodic_table_(navbox)" title="Special:EditPage/Template:Periodic table (navbox)"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Periodic_table18" style="font-size:114%;margin:0 4em"><a href="/wiki/Periodic_table" title="Periodic table">Periodic table</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd wraplinks" style="width:100%;padding:0"><div style="padding:0 0.25em"> <table style="table-layout:fixed; width:100%;" aria-describedby="periodic-table-legend"> <tbody><tr> <td style="line-height:100%;"> </td> <th scope="col" style="font-weight:normal;"><a href="/wiki/Alkali_metal" title="Alkali metal">1</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Alkaline_earth_metal" title="Alkaline earth metal">2</a> </th> <td colspan="14"> </td> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_3_element" title="Group 3 element">3</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_4_element" title="Group 4 element">4</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_5_element" title="Group 5 element">5</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_6_element" title="Group 6 element">6</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_7_element" title="Group 7 element">7</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_8_element" title="Group 8 element">8</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_9_element" title="Group 9 element">9</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_10_element" title="Group 10 element">10</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_11_element" title="Group 11 element">11</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Group_12_element" title="Group 12 element">12</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Boron_group" title="Boron group">13</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Carbon_group" title="Carbon group">14</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Pnictogen" title="Pnictogen">15</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Chalcogen" title="Chalcogen">16</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Halogen" title="Halogen">17</a> </th> <th scope="col" style="font-weight:normal;"><a href="/wiki/Noble_gas" title="Noble gas">18</a> </th></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_1_element" title="Period 1 element">1</a> </th> <td title="H, Hydrogen" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Hydrogen" title="Hydrogen"><span style="display:block">H</span></a></span> </td> <td colspan="30"> </td> <td title="He, Helium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Helium" title="Helium"><span style="display:block">He</span></a></span> </td></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_2_element" title="Period 2 element">2</a> </th> <td title="Li, Lithium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Lithium" title="Lithium"><span style="display:block">Li</span></a></span> </td> <td title="Be, Beryllium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Beryllium" title="Beryllium"><span style="display:block">Be</span></a></span> </td> <td colspan="24"> </td> <td title="B, Boron" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Boron" title="Boron"><span style="display:block">B</span></a></span> </td> <td title="C, Carbon" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Carbon" title="Carbon"><span style="display:block">C</span></a></span> </td> <td title="N, Nitrogen" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Nitrogen" title="Nitrogen"><span style="display:block">N</span></a></span> </td> <td title="O, Oxygen" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Oxygen" title="Oxygen"><span style="display:block">O</span></a></span> </td> <td title="F, Fluorine" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Fluorine" title="Fluorine"><span style="display:block">F</span></a></span> </td> <td title="Ne, Neon" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Neon" title="Neon"><span style="display:block">Ne</span></a></span> </td></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_3_element" title="Period 3 element">3</a> </th> <td title="Na, Sodium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Sodium" title="Sodium"><span style="display:block">Na</span></a></span> </td> <td title="Mg, Magnesium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Magnesium" title="Magnesium"><span style="display:block">Mg</span></a></span> </td> <td colspan="24"> </td> <td title="Al, Aluminium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Aluminium" title="Aluminium"><span style="display:block">Al</span></a></span> </td> <td title="Si, Silicon" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Silicon" title="Silicon"><span style="display:block">Si</span></a></span> </td> <td title="P, Phosphorus" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Phosphorus" title="Phosphorus"><span style="display:block">P</span></a></span> </td> <td title="S, Sulfur" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Sulfur" title="Sulfur"><span style="display:block">S</span></a></span> </td> <td title="Cl, Chlorine" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Chlorine" title="Chlorine"><span style="display:block">Cl</span></a></span> </td> <td title="Ar, Argon" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Argon" title="Argon"><span style="display:block">Ar</span></a></span> </td></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_4_element" title="Period 4 element">4</a> </th> <td title="K, Potassium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Potassium" title="Potassium"><span style="display:block">K</span></a></span> </td> <td title="Ca, Calcium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Calcium" title="Calcium"><span style="display:block">Ca</span></a></span> </td> <td colspan="14"> </td> <td title="Sc, Scandium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Scandium" title="Scandium"><span style="display:block">Sc</span></a></span> </td> <td title="Ti, Titanium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Titanium" title="Titanium"><span style="display:block">Ti</span></a></span> </td> <td title="V, Vanadium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Vanadium" title="Vanadium"><span style="display:block">V</span></a></span> </td> <td title="Cr, Chromium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Chromium" title="Chromium"><span style="display:block">Cr</span></a></span> </td> <td title="Mn, Manganese" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Manganese" title="Manganese"><span style="display:block">Mn</span></a></span> </td> <td title="Fe, Iron" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Iron" title="Iron"><span style="display:block">Fe</span></a></span> </td> <td title="Co, Cobalt" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Cobalt" title="Cobalt"><span style="display:block">Co</span></a></span> </td> <td title="Ni, Nickel" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Nickel" title="Nickel"><span style="display:block">Ni</span></a></span> </td> <td title="Cu, Copper" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Copper" title="Copper"><span style="display:block">Cu</span></a></span> </td> <td title="Zn, Zinc" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Zinc" title="Zinc"><span style="display:block">Zn</span></a></span> </td> <td title="Ga, Gallium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Gallium" title="Gallium"><span style="display:block">Ga</span></a></span> </td> <td title="Ge, Germanium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Germanium" title="Germanium"><span style="display:block">Ge</span></a></span> </td> <td title="As, Arsenic" style="text-align:center; background-color:#fdff8c; color:inherit; border:3px solid black; ;"><span class="nowrap"><a class="mw-selflink selflink"><span style="display:block">As</span></a></span> </td> <td title="Se, Selenium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Selenium" title="Selenium"><span style="display:block">Se</span></a></span> </td> <td title="Br, Bromine" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Bromine" title="Bromine"><span style="display:block">Br</span></a></span> </td> <td title="Kr, Krypton" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Krypton" title="Krypton"><span style="display:block">Kr</span></a></span> </td></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_5_element" title="Period 5 element">5</a> </th> <td title="Rb, Rubidium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Rubidium" title="Rubidium"><span style="display:block">Rb</span></a></span> </td> <td title="Sr, Strontium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Strontium" title="Strontium"><span style="display:block">Sr</span></a></span> </td> <td colspan="14"> </td> <td title="Y, Yttrium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Yttrium" title="Yttrium"><span style="display:block">Y</span></a></span> </td> <td title="Zr, Zirconium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Zirconium" title="Zirconium"><span style="display:block">Zr</span></a></span> </td> <td title="Nb, Niobium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Niobium" title="Niobium"><span style="display:block">Nb</span></a></span> </td> <td title="Mo, Molybdenum" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Molybdenum" title="Molybdenum"><span style="display:block">Mo</span></a></span> </td> <td title="Tc, Technetium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Technetium" title="Technetium"><span style="display:block">Tc</span></a></span> </td> <td title="Ru, Ruthenium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Ruthenium" title="Ruthenium"><span style="display:block">Ru</span></a></span> </td> <td title="Rh, Rhodium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Rhodium" title="Rhodium"><span style="display:block">Rh</span></a></span> </td> <td title="Pd, Palladium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Palladium" title="Palladium"><span style="display:block">Pd</span></a></span> </td> <td title="Ag, Silver" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Silver" title="Silver"><span style="display:block">Ag</span></a></span> </td> <td title="Cd, Cadmium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Cadmium" title="Cadmium"><span style="display:block">Cd</span></a></span> </td> <td title="In, Indium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Indium" title="Indium"><span style="display:block">In</span></a></span> </td> <td title="Sn, Tin" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Tin" title="Tin"><span style="display:block">Sn</span></a></span> </td> <td title="Sb, Antimony" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Antimony" title="Antimony"><span style="display:block">Sb</span></a></span> </td> <td title="Te, Tellurium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Tellurium" title="Tellurium"><span style="display:block">Te</span></a></span> </td> <td title="I, Iodine" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Iodine" title="Iodine"><span style="display:block">I</span></a></span> </td> <td title="Xe, Xenon" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Xenon" title="Xenon"><span style="display:block">Xe</span></a></span> </td></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_6_element" title="Period 6 element">6</a> </th> <td title="Cs, Caesium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Caesium" title="Caesium"><span style="display:block">Cs</span></a></span> </td> <td title="Ba, Barium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Barium" title="Barium"><span style="display:block">Ba</span></a></span> </td> <td title="La, Lanthanum" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Lanthanum" title="Lanthanum"><span style="display:block">La</span></a></span> </td> <td title="Ce, Cerium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Cerium" title="Cerium"><span style="display:block">Ce</span></a></span> </td> <td title="Pr, Praseodymium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Praseodymium" title="Praseodymium"><span style="display:block">Pr</span></a></span> </td> <td title="Nd, Neodymium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Neodymium" title="Neodymium"><span style="display:block">Nd</span></a></span> </td> <td title="Pm, Promethium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Promethium" title="Promethium"><span style="display:block">Pm</span></a></span> </td> <td title="Sm, Samarium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Samarium" title="Samarium"><span style="display:block">Sm</span></a></span> </td> <td title="Eu, Europium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Europium" title="Europium"><span style="display:block">Eu</span></a></span> </td> <td title="Gd, Gadolinium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Gadolinium" title="Gadolinium"><span style="display:block">Gd</span></a></span> </td> <td title="Tb, Terbium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Terbium" title="Terbium"><span style="display:block">Tb</span></a></span> </td> <td title="Dy, Dysprosium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Dysprosium" title="Dysprosium"><span style="display:block">Dy</span></a></span> </td> <td title="Ho, Holmium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Holmium" title="Holmium"><span style="display:block">Ho</span></a></span> </td> <td title="Er, Erbium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Erbium" title="Erbium"><span style="display:block">Er</span></a></span> </td> <td title="Tm, Thulium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Thulium" title="Thulium"><span style="display:block">Tm</span></a></span> </td> <td title="Yb, Ytterbium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Ytterbium" title="Ytterbium"><span style="display:block">Yb</span></a></span> </td> <td title="Lu, Lutetium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Lutetium" title="Lutetium"><span style="display:block">Lu</span></a></span> </td> <td title="Hf, Hafnium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Hafnium" title="Hafnium"><span style="display:block">Hf</span></a></span> </td> <td title="Ta, Tantalum" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Tantalum" title="Tantalum"><span style="display:block">Ta</span></a></span> </td> <td title="W, Tungsten" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Tungsten" title="Tungsten"><span style="display:block">W</span></a></span> </td> <td title="Re, Rhenium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Rhenium" title="Rhenium"><span style="display:block">Re</span></a></span> </td> <td title="Os, Osmium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Osmium" title="Osmium"><span style="display:block">Os</span></a></span> </td> <td title="Ir, Iridium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Iridium" title="Iridium"><span style="display:block">Ir</span></a></span> </td> <td title="Pt, Platinum" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Platinum" title="Platinum"><span style="display:block">Pt</span></a></span> </td> <td title="Au, Gold" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Gold" title="Gold"><span style="display:block">Au</span></a></span> </td> <td title="Hg, Mercury" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Mercury_(element)" title="Mercury (element)"><span style="display:block">Hg</span></a></span> </td> <td title="Tl, Thallium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Thallium" title="Thallium"><span style="display:block">Tl</span></a></span> </td> <td title="Pb, Lead" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Lead" title="Lead"><span style="display:block">Pb</span></a></span> </td> <td title="Bi, Bismuth" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Bismuth" title="Bismuth"><span style="display:block">Bi</span></a></span> </td> <td title="Po, Polonium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Polonium" title="Polonium"><span style="display:block">Po</span></a></span> </td> <td title="At, Astatine" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Astatine" title="Astatine"><span style="display:block">At</span></a></span> </td> <td title="Rn, Radon" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Radon" title="Radon"><span style="display:block">Rn</span></a></span> </td></tr> <tr> <th scope="row" style="font-weight:normal;"><a href="/wiki/Period_7_element" title="Period 7 element">7</a> </th> <td title="Fr, Francium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Francium" title="Francium"><span style="display:block">Fr</span></a></span> </td> <td title="Ra, Radium" style="text-align:center; background-color:#ff9999; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Radium" title="Radium"><span style="display:block">Ra</span></a></span> </td> <td title="Ac, Actinium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Actinium" title="Actinium"><span style="display:block">Ac</span></a></span> </td> <td title="Th, Thorium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Thorium" title="Thorium"><span style="display:block">Th</span></a></span> </td> <td title="Pa, Protactinium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Protactinium" title="Protactinium"><span style="display:block">Pa</span></a></span> </td> <td title="U, Uranium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Uranium" title="Uranium"><span style="display:block">U</span></a></span> </td> <td title="Np, Neptunium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Neptunium" title="Neptunium"><span style="display:block">Np</span></a></span> </td> <td title="Pu, Plutonium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Plutonium" title="Plutonium"><span style="display:block">Pu</span></a></span> </td> <td title="Am, Americium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Americium" title="Americium"><span style="display:block">Am</span></a></span> </td> <td title="Cm, Curium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Curium" title="Curium"><span style="display:block">Cm</span></a></span> </td> <td title="Bk, Berkelium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Berkelium" title="Berkelium"><span style="display:block">Bk</span></a></span> </td> <td title="Cf, Californium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Californium" title="Californium"><span style="display:block">Cf</span></a></span> </td> <td title="Es, Einsteinium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Einsteinium" title="Einsteinium"><span style="display:block">Es</span></a></span> </td> <td title="Fm, Fermium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Fermium" title="Fermium"><span style="display:block">Fm</span></a></span> </td> <td title="Md, Mendelevium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Mendelevium" title="Mendelevium"><span style="display:block">Md</span></a></span> </td> <td title="No, Nobelium" style="text-align:center; background-color:#9bff99; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Nobelium" title="Nobelium"><span style="display:block">No</span></a></span> </td> <td title="Lr, Lawrencium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Lawrencium" title="Lawrencium"><span style="display:block">Lr</span></a></span> </td> <td title="Rf, Rutherfordium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Rutherfordium" title="Rutherfordium"><span style="display:block">Rf</span></a></span> </td> <td title="Db, Dubnium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Dubnium" title="Dubnium"><span style="display:block">Db</span></a></span> </td> <td title="Sg, Seaborgium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Seaborgium" title="Seaborgium"><span style="display:block">Sg</span></a></span> </td> <td title="Bh, Bohrium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Bohrium" title="Bohrium"><span style="display:block">Bh</span></a></span> </td> <td title="Hs, Hassium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Hassium" title="Hassium"><span style="display:block">Hs</span></a></span> </td> <td title="Mt, Meitnerium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Meitnerium" title="Meitnerium"><span style="display:block">Mt</span></a></span> </td> <td title="Ds, Darmstadtium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Darmstadtium" title="Darmstadtium"><span style="display:block">Ds</span></a></span> </td> <td title="Rg, Roentgenium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Roentgenium" title="Roentgenium"><span style="display:block">Rg</span></a></span> </td> <td title="Cn, Copernicium" style="text-align:center; background-color:#99ccff; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Copernicium" title="Copernicium"><span style="display:block">Cn</span></a></span> </td> <td title="Nh, Nihonium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Nihonium" title="Nihonium"><span style="display:block">Nh</span></a></span> </td> <td title="Fl, Flerovium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Flerovium" title="Flerovium"><span style="display:block">Fl</span></a></span> </td> <td title="Mc, Moscovium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Moscovium" title="Moscovium"><span style="display:block">Mc</span></a></span> </td> <td title="Lv, Livermorium" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Livermorium" title="Livermorium"><span style="display:block">Lv</span></a></span> </td> <td title="Ts, Tennessine" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Tennessine" title="Tennessine"><span style="display:block">Ts</span></a></span> </td> <td title="Og, Oganesson" style="text-align:center; background-color:#fdff8c; color:inherit; border:none; ;"><span class="nowrap"><a href="/wiki/Oganesson" title="Oganesson"><span style="display:block">Og</span></a></span> </td></tr></tbody></table> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even wraplinks" style="width:100%;padding:0"><div style="padding:0 0.25em"><div role="presentation" id="periodic-table-legend" style="border: 1px solid #a2a9b1; width:100%; line-height:120%; text-align:center; vertical-align:top; background:#f8f8f8;color:inherit; margin:0; margin:0;"><div style="padding:0.3em;"> <table style="width:100%; line-height:1.2em; table-layout:fixed; overflow:hidden; text-align:center;"> <tbody><tr> <td style="padding:0 1px; background:#ff9999;color:inherit;"><a href="/wiki/S-block" class="mw-redirect" title="S-block">s-block</a> </td> <td style="padding:0 1px; background:#9bff99;color:inherit;"><a href="/wiki/F-block" class="mw-redirect" title="F-block">f-block</a> </td> <td style="padding:0 1px; background:#99ccff;color:inherit;"><a href="/wiki/D-block" class="mw-redirect" 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href="/wiki/Template:Arsenic_compounds" title="Template:Arsenic compounds"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Arsenic_compounds" title="Template talk:Arsenic compounds"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Arsenic_compounds" title="Special:EditPage/Template:Arsenic compounds"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Arsenic_compounds55" style="font-size:114%;margin:0 4em"><a class="mw-selflink selflink">Arsenic</a> compounds</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Arsenide" title="Arsenide">Arsenides</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aluminium_arsenide" title="Aluminium arsenide">AlAs</a></li> <li><a href="/wiki/Boron_arsenide" title="Boron arsenide">BAs</a></li> <li><a href="/wiki/Bismuth_arsenide" title="Bismuth arsenide">BiAs</a></li> <li><span class="chemf nowrap"><a href="/wiki/Cadmium_arsenide" title="Cadmium arsenide">Cd<sub class="template-chem2-sub">3</sub>As<sub class="template-chem2-sub">2</sub></a></span></li> <li><a href="/wiki/Calcium_arsenide" title="Calcium arsenide">CaAs</a></li> <li><a href="/wiki/Cobalt_arsenide" title="Cobalt arsenide">CoAs</a></li> <li><a href="/wiki/Dysprosium_arsenide" title="Dysprosium arsenide">DyAs</a></li> <li><span class="chemf nowrap"><a href="/wiki/Holmium_arsenide" title="Holmium arsenide">HoAs</a></span></li> <li><a href="/wiki/Gallium_arsenide" title="Gallium arsenide">GaAs</a></li> <li><a href="/wiki/Indium_arsenide" title="Indium arsenide">InAs</a></li> <li><a href="/wiki/Yttrium(III)_arsenide" title="Yttrium(III) arsenide">YAs</a></li> <li><a href="/wiki/Lithium_arsenide" title="Lithium arsenide">LiAs</a></li> <li><a href="/wiki/Molybdenum_diarsenide" title="Molybdenum diarsenide">MoAs<sub>2</sub></a></li> <li><a href="/wiki/Manganese_arsenide" title="Manganese arsenide">MnAs</a></li> <li><a href="/wiki/Neptunium_arsenide" title="Neptunium arsenide">NpAs</a></li> <li><span class="chemf nowrap"><a href="/wiki/Neptunium_diarsenide" title="Neptunium diarsenide">NpAs<sub class="template-chem2-sub">2</sub></a></span></li> <li><a href="/wiki/Palladium_diarsenide" title="Palladium diarsenide">PdAs<sub>2</sub></a></li> <li><a href="/wiki/Praseodymium_arsenide" title="Praseodymium arsenide">PrAs</a></li> <li><a href="/wiki/Plutonium_arsenide" class="mw-redirect" title="Plutonium arsenide">PuAs</a></li> <li><a href="/wiki/Samarium_arsenide" class="mw-redirect" title="Samarium arsenide">SmAs</a></li> <li><a href="/wiki/Sodium_arsenide" title="Sodium arsenide">Na<sub>3</sub>As</a></li> <li><a href="/wiki/Tantalum_arsenide" title="Tantalum arsenide">TaAs</a></li> <li><a href="/wiki/Tungsten_diarsenide" title="Tungsten diarsenide">WAs<sub>2</sub></a></li> <li><a href="/wiki/Yttrium_arsenide" class="mw-redirect" title="Yttrium arsenide">YAs</a></li> <li><span class="chemf nowrap"><a href="/wiki/Zinc_arsenide" title="Zinc arsenide">Zn<sub class="template-chem2-sub">3</sub>As<sub class="template-chem2-sub">2</sub></a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">As(III)</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arsenic_tribromide" title="Arsenic tribromide">AsBr<sub>3</sub></a></li> <li><a href="/wiki/Arsenic_trichloride" title="Arsenic trichloride">AsCl<sub>3</sub></a></li> <li><a href="/wiki/Arsenic_pentachloride" title="Arsenic pentachloride">AsCl<sub>5</sub></a></li> <li><a href="/wiki/Arsenic_trifluoride" title="Arsenic trifluoride">AsF<sub>3</sub></a></li> <li><a href="/wiki/Arsine" title="Arsine">AsH<sub>3</sub></a></li> <li><a href="/wiki/Arsenic_triiodide" title="Arsenic triiodide">AsI<sub>3</sub></a></li> <li><span class="chemf nowrap"><a href="/wiki/Arsenic_trioxide" title="Arsenic trioxide">As<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">3</sub></a></span></li> <li><span class="chemf nowrap"><a href="/wiki/Arsenic_trisulfide" title="Arsenic trisulfide">As<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">3</sub></a></span></li> <li><span class="chemf nowrap"><a href="/wiki/Arsenic_triselenide" title="Arsenic triselenide">As<sub class="template-chem2-sub">2</sub>Se<sub class="template-chem2-sub">3</sub></a></span></li> <li><span class="chemf nowrap"><a href="/wiki/Realgar" title="Realgar">As<sub class="template-chem2-sub">4</sub>S<sub class="template-chem2-sub">4</sub></a></span></li> <li><span class="chemf nowrap"><a href="/wiki/Arsenic_monophosphide" title="Arsenic monophosphide">AsP</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">As(III,V)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="chemf nowrap"><a href="/wiki/Arsenic_tetroxide" title="Arsenic tetroxide">As<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub></a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">As(V)</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arsenic_pentafluoride" title="Arsenic pentafluoride">AsF<sub>5</sub></a></li> <li><a href="/wiki/Arsenic_pentachloride" title="Arsenic pentachloride">AsCl<sub>5</sub></a></li> <li><span class="chemf nowrap"><a href="/wiki/Arsenic_pentoxide" title="Arsenic pentoxide">As<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></a></span></li> <li><span class="chemf nowrap"><a href="/wiki/Arsenic_pentasulfide" title="Arsenic pentasulfide">As<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">5</sub></a></span></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Arsenides153" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Arsenides" title="Template:Arsenides"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Arsenides" title="Template talk:Arsenides"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Arsenides" title="Special:EditPage/Template:Arsenides"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Arsenides153" style="font-size:114%;margin:0 4em"><a href="/wiki/Arsenide" title="Arsenide">Arsenides</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Binary_phase" title="Binary phase">Binary</a> arsenides</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <table style="margin: 0 auto;"> <tbody><tr> <td style="width:2em; border:1px solid #aaaaaa; background-color:mistyrose;" align="center"><a href="/wiki/Arsine" title="Arsine"><span class="nowrap">AsH<sub>3</sub></span></a><br /><a href="/wiki/Arsenide_hydride" title="Arsenide hydride">+H</a> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em;"> </td> <td style="width:2em; border:1px solid #aaaaaa; background-color:silver;"><small>He</small> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Lithium_arsenide" title="Lithium arsenide"><span class="nowrap">LiAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Be</small> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Boron_arsenide" title="Boron arsenide"><span class="nowrap">BAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>C</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Arsenide_nitride" title="Arsenide nitride">+N</a> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><a href="/wiki/Oxyarsenides" title="Oxyarsenides">+O</a> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><small>F</small> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Ne</small> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Sodium_arsenide" title="Sodium arsenide">Na<sub>3</sub>As</a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Mg</small> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Aluminium_arsenide" title="Aluminium arsenide"><span class="nowrap">AlAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Arsenidosilicate" title="Arsenidosilicate">-Si</a> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>P</small> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><small>S</small> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><a href="/wiki/Arsenide_chloride" title="Arsenide chloride">+Cl</a> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Ar</small> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>K</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Calcium_arsenide" title="Calcium arsenide">CaAs</a> </td> <td> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Sc</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ti</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>V</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Cr</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Manganese_arsenide" title="Manganese arsenide"><span class="nowrap">MnAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Fe</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Cobalt_arsenide" title="Cobalt arsenide"><span class="nowrap">CoAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ni</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose"><small>Cu</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose"><a href="/wiki/Zinc_arsenide" title="Zinc arsenide"><span class="nowrap">Zn<sub>3</sub>As<sub>2</sub></span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Gallium_arsenide" title="Gallium arsenide"><span class="nowrap">GaAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose"><a href="/wiki/Arsenidogermanate" title="Arsenidogermanate">-Ge</a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a class="mw-selflink selflink">As</a></small> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><small>Se</small> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><a href="/wiki/Arsenide_bromide" title="Arsenide bromide">+Br</a> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Kr</small> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Rb</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Sr</small> </td> <td> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Yttrium(III)_arsenide" title="Yttrium(III) arsenide"><span class="nowrap">YAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Zr</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Nb</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Molybdenum_diarsenide" title="Molybdenum diarsenide"><span class="nowrap">MoAs<sub>2</sub></span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Tc</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ru</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Rh</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Palladium_diarsenide" title="Palladium diarsenide"><span class="nowrap">PdAs<sub>2</sub></span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ag</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Cadmium_arsenide" title="Cadmium arsenide"><span class="nowrap">Cd<sub>3</sub>As<sub>2</sub></span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Indium_arsenide" title="Indium arsenide"><span class="nowrap">InAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Arsenidostannate" title="Arsenidostannate">-Sn</a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Sb</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Arsenide_telluride" title="Arsenide telluride">+Te</a> </td> <td style="border:1px solid #aaaaaa; background-color:lavender;"><a href="/wiki/Arsenide_iodide" title="Arsenide iodide">+I</a> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Xe</small> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Cs</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ba</small> </td> <td style="border:1px solid #aaaaaa;">* </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Lu</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Hf</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Tantalum_arsenide" title="Tantalum arsenide"><span class="nowrap">TaAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Tungsten_diarsenide" title="Tungsten diarsenide"><span class="nowrap">WAs<sub>2</sub></span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Re</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Os</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ir</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Pt</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Au</small> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Hg</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Tl</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Pb</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><a href="/wiki/Bismuth_arsenide" title="Bismuth arsenide"><span class="nowrap">BiAs</span></a> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Po</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>At</small> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Rn</small> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Fr</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ra</small> </td> <td style="border:1px solid #aaaaaa;">** </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Lr</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Rf</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Db</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Sg</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Bh</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Hs</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Mt</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ds</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Rg</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Cn</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Nh</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Fl</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Mc</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Lv</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ts</small> </td> <td style="border:1px solid #aaaaaa; background-color:silver;"><small>Og</small> </td></tr> <tr> <td> </td> <td> </td> <td>&#8595; </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td colspan="3"> </td> <td> </td> <td> </td></tr> <tr> <td style="text-align:center;"> </td> <td> </td> <td><span style="float: right">*</span> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>La</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ce</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a href="/wiki/Praseodymium_arsenide" title="Praseodymium arsenide"><span class="nowrap">PrAs</span></a></small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Nd</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Pm</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a href="/wiki/Samarium(III)_arsenide" title="Samarium(III) arsenide"><span class="nowrap">SmAs</span></a></small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Eu</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Gd</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Tb</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a href="/wiki/Dysprosium_arsenide" title="Dysprosium arsenide"><span class="nowrap">DyAs</span></a></small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a href="/wiki/Holmium_arsenide" title="Holmium arsenide"><span class="nowrap">HoAs</span></a></small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Er</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Tm</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Yb</small> </td> <td> </td></tr> <tr> <td style="text-align:right;"> </td> <td> </td> <td><span style="float: right">**</span> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Ac</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Th</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Pa</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>U</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a href="/wiki/Neptunium_arsenide" title="Neptunium arsenide"><span class="nowrap">NpAs</span></a><br /><a href="/wiki/Neptunium_diarsenide" title="Neptunium diarsenide"><span class="nowrap">NpAs<sub>2</sub></span></a></small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small><a href="/wiki/Plutonium_arsenide" class="mw-redirect" title="Plutonium arsenide"><span class="nowrap">PuAs</span></a></small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Am</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Cm</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Bk</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Cf</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Es</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Fm</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>Md</small> </td> <td style="border:1px solid #aaaaaa; background-color:mistyrose;"><small>No</small> </td> <td> </td></tr></tbody></table> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Ternary_compound" title="Ternary compound">Ternary</a> arsenides</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aluminium_gallium_arsenide" title="Aluminium gallium arsenide">AlGaAs</a></li> <li><a href="/wiki/Aluminium_indium_arsenide" title="Aluminium indium arsenide">AlInAs</a></li> <li><a href="/wiki/Aluminium_arsenide_antimonide" title="Aluminium arsenide antimonide">AlAsSb</a></li> <li><a href="/wiki/Gallium_arsenide_phosphide" title="Gallium arsenide phosphide">GaAsP</a></li> <li><a href="/wiki/Gallium_arsenide_antimonide" title="Gallium arsenide antimonide">GaAsSb</a></li> <li><a href="/wiki/Gallium_manganese_arsenide" title="Gallium manganese arsenide">(Ga,Mn)As</a></li> <li><a href="/wiki/Indium_arsenide_antimonide" title="Indium arsenide antimonide">InAsSb</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Quaternary_compound" title="Quaternary compound">Quaternary</a> arsenides</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Zinc_cadmium_phosphide_arsenide" title="Zinc cadmium phosphide arsenide">Zn-Cd-P-As</a></li> <li><a href="/wiki/Indium_arsenide_antimonide_phosphide" title="Indium arsenide antimonide phosphide">InAsSbP</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Quinary arsenides</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gallium_indium_arsenide_antimonide_phosphide" title="Gallium indium arsenide antimonide phosphide">GaInAsSbP</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">See also</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Oxyarsenides" title="Oxyarsenides">Oxyarsenides</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link 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