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class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Properties"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Properties</span> </div> </a> <button aria-controls="toc-Properties-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 Properties subsection</span> </button> <ul id="toc-Properties-sublist" class="vector-toc-list"> <li id="toc-Acidic_properties" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Acidic_properties"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Acidic properties</span> </div> </a> <ul id="toc-Acidic_properties-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Aqueous_solutions" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Aqueous_solutions"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Aqueous solutions</span> </div> </a> <ul id="toc-Aqueous_solutions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Self_condensation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Self_condensation"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Self condensation</span> </div> </a> <ul id="toc-Self_condensation-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Uses" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Uses"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Uses</span> </div> </a> <ul id="toc-Uses-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Safety" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Safety"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Safety</span> </div> </a> <ul id="toc-Safety-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</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 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cited_sources" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cited_sources"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Cited sources</span> </div> </a> <ul id="toc-Cited_sources-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</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">Phosphoric acid</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 67 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-67" 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">67 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/Fosforsuur" title="Fosforsuur – Afrikaans" lang="af" hreflang="af" data-title="Fosforsuur" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AD%D9%85%D8%B6_%D8%A7%D9%84%D9%81%D8%B3%D9%81%D9%88%D8%B1%D9%8A%D9%83" title="حمض الفسفوريك – Arabic" lang="ar" hreflang="ar" data-title="حمض الفسفوريك" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/%C3%81cidu_fosf%C3%B3rico" title="Ácidu fosfórico – Asturian" lang="ast" hreflang="ast" data-title="Ácidu fosfórico" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%81%D9%88%D8%B3%D9%81%D9%88%D8%B1%DB%8C%DA%A9_%D8%A7%D8%B3%DB%8C%D8%AF" title="فوسفوریک اسید – South Azerbaijani" lang="azb" hreflang="azb" data-title="فوسفوریک اسید" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AB%E0%A6%B8%E0%A6%AB%E0%A6%B0%E0%A6%BF%E0%A6%95_%E0%A6%85%E0%A7%8D%E0%A6%AF%E0%A6%BE%E0%A6%B8%E0%A6%BF%E0%A6%A1" title="ফসফরিক অ্যাসিড – Bangla" lang="bn" hreflang="bn" data-title="ফসফরিক অ্যাসিড" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A4%D0%BE%D1%81%D1%84%D0%BE%D1%80%D0%BD%D0%B0_%D0%BA%D0%B8%D1%81%D0%B5%D0%BB%D0%B8%D0%BD%D0%B0" title="Фосфорна киселина – Bulgarian" lang="bg" hreflang="bg" data-title="Фосфорна киселина" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Fosforna_kiselina" title="Fosforna kiselina – Bosnian" lang="bs" hreflang="bs" data-title="Fosforna kiselina" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/%C3%80cid_fosf%C3%B2ric" title="Àcid fosfòric – Catalan" lang="ca" hreflang="ca" data-title="Àcid fosfòric" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Kyselina_fosfore%C4%8Dn%C3%A1" title="Kyselina fosforečná – Czech" lang="cs" hreflang="cs" data-title="Kyselina fosforečná" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Asid_ffosfforig" title="Asid ffosfforig – Welsh" lang="cy" hreflang="cy" data-title="Asid ffosfforig" 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/Fosforsyre" title="Fosforsyre – Danish" lang="da" hreflang="da" data-title="Fosforsyre" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Phosphors%C3%A4ure" title="Phosphorsäure – German" lang="de" hreflang="de" data-title="Phosphorsäure" 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/Fosforhape" title="Fosforhape – Estonian" lang="et" hreflang="et" data-title="Fosforhape" 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%A6%CF%89%CF%83%CF%86%CE%BF%CF%81%CE%B9%CE%BA%CF%8C_%CE%BF%CE%BE%CF%8D" title="Φωσφορικό οξύ – Greek" lang="el" hreflang="el" data-title="Φωσφορικό οξύ" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/%C3%81cido_fosf%C3%B3rico" title="Ácido fosfórico – Spanish" lang="es" hreflang="es" data-title="Ácido fosfórico" 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/Fosfata_acido" title="Fosfata acido – Esperanto" lang="eo" hreflang="eo" data-title="Fosfata acido" 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/Azido_fosforiko" title="Azido fosforiko – Basque" lang="eu" hreflang="eu" data-title="Azido fosforiko" 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/%D9%81%D8%B3%D9%81%D8%B1%DB%8C%DA%A9_%D8%A7%D8%B3%DB%8C%D8%AF" title="فسفریک اسید – Persian" lang="fa" hreflang="fa" data-title="فسفریک اسید" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Acide_phosphorique" title="Acide phosphorique – French" lang="fr" hreflang="fr" data-title="Acide phosphorique" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Aig%C3%A9ad_fosfarach" title="Aigéad fosfarach – Irish" lang="ga" hreflang="ga" data-title="Aigéad fosfarach" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/%C3%81cido_fosf%C3%B3rico" title="Ácido fosfórico – Galician" lang="gl" hreflang="gl" data-title="Ácido fosfórico" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9D%B8%EC%82%B0" title="인산 – Korean" lang="ko" hreflang="ko" data-title="인산" 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/%D5%95%D6%80%D5%A9%D5%B8%D6%86%D5%B8%D5%BD%D6%86%D5%B8%D6%80%D5%A1%D5%AF%D5%A1%D5%B6_%D5%A9%D5%A9%D5%B8%D6%82" title="Օրթոֆոսֆորական թթու – Armenian" lang="hy" hreflang="hy" data-title="Օրթոֆոսֆորական թթու" 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%AB%E0%A4%BE%E0%A4%B8%E0%A5%8D%E0%A4%AB%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%95_%E0%A4%85%E0%A4%AE%E0%A5%8D%E0%A4%B2" title="फास्फोरिक अम्ल – Hindi" lang="hi" hreflang="hi" data-title="फास्फोरिक अम्ल" 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/Fosforna_kiselina" title="Fosforna kiselina – Croatian" lang="hr" hreflang="hr" data-title="Fosforna kiselina" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Asam_fosfat" title="Asam fosfat – Indonesian" lang="id" hreflang="id" data-title="Asam fosfat" 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-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Acido_fosforico" title="Acido fosforico – Italian" lang="it" hreflang="it" data-title="Acido fosforico" 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%97%D7%95%D7%9E%D7%A6%D7%94_%D7%96%D7%A8%D7%97%D7%AA%D7%99%D7%AA" title="חומצה זרחתית – Hebrew" lang="he" hreflang="he" data-title="חומצה זרחתית" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%AB%E0%B2%BE%E0%B2%B8%E0%B3%8D%E2%80%8D%E0%B2%AB%E0%B2%BE%E0%B2%B0%E0%B2%BF%E0%B2%95%E0%B3%8D_%E0%B2%86%E0%B2%AE%E0%B3%8D%E0%B2%B2" title="ಫಾಸ್‍ಫಾರಿಕ್ ಆಮ್ಲ – Kannada" lang="kn" hreflang="kn" data-title="ಫಾಸ್‍ಫಾರಿಕ್ ಆಮ್ಲ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A4%E1%83%9D%E1%83%A1%E1%83%A4%E1%83%9D%E1%83%A0%E1%83%9B%E1%83%9F%E1%83%90%E1%83%95%E1%83%90" title="ფოსფორმჟავა – Georgian" lang="ka" hreflang="ka" data-title="ფოსფორმჟავა" 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%A4%D0%BE%D1%81%D1%84%D0%BE%D1%80_%D2%9B%D1%8B%D1%88%D2%9B%D1%8B%D0%BB%D1%8B" title="Фосфор қышқылы – Kazakh" lang="kk" hreflang="kk" data-title="Фосфор қышқылы" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9E%D1%80%D1%82%D0%BE%D1%84%D0%BE%D1%81%D1%84%D0%BE%D1%80_%D0%BA%D0%B8%D1%81%D0%BB%D0%BE%D1%82%D0%B0%D1%81%D1%8B" title="Ортофосфор кислотасы – Kyrgyz" lang="ky" hreflang="ky" data-title="Ортофосфор кислотасы" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Acidum_phosphoricum" title="Acidum phosphoricum – Latin" lang="la" hreflang="la" data-title="Acidum phosphoricum" 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/Ortofosforsk%C4%81be" title="Ortofosforskābe – Latvian" lang="lv" hreflang="lv" data-title="Ortofosforskābe" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Fosforo_r%C5%ABg%C5%A1tis" title="Fosforo rūgštis – Lithuanian" lang="lt" hreflang="lt" data-title="Fosforo rūgštis" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Foszforsav" title="Foszforsav – Hungarian" lang="hu" hreflang="hu" data-title="Foszforsav" 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%A4%D0%BE%D1%81%D1%84%D0%BE%D1%80%D0%BD%D0%B0_%D0%BA%D0%B8%D1%81%D0%B5%D0%BB%D0%B8%D0%BD%D0%B0" title="Фосфорна киселина – Macedonian" lang="mk" hreflang="mk" data-title="Фосфорна киселина" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%AB%E0%A5%89%E0%A4%B8%E0%A5%8D%E0%A4%AB%E0%A4%B0%E0%A4%BF%E0%A4%95_%E0%A4%86%E0%A4%AE%E0%A5%8D%E0%A4%B2" title="फॉस्फरिक आम्ल – Marathi" lang="mr" hreflang="mr" data-title="फॉस्फरिक आम्ल" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Asid_fosforik" title="Asid fosforik – Malay" lang="ms" hreflang="ms" data-title="Asid fosforik" 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-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Fosforzuur" title="Fosforzuur – Dutch" lang="nl" hreflang="nl" data-title="Fosforzuur" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%AA%E3%83%B3%E9%85%B8" title="リン酸 – Japanese" lang="ja" hreflang="ja" data-title="リン酸" 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/Fosfoors%C3%BCren" title="Fosfoorsüren – Northern Frisian" lang="frr" hreflang="frr" data-title="Fosfoorsüren" 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/Fosforsyre" title="Fosforsyre – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Fosforsyre" 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-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Acid_fosforic" title="Acid fosforic – Occitan" lang="oc" hreflang="oc" data-title="Acid fosforic" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%81%D8%A7%D8%B3%D9%81%D9%88%D8%B1%DA%A9_%D8%AA%DB%8C%D8%B2%D8%A7%D8%A8" title="فاسفورک تیزاب – Western Punjabi" lang="pnb" hreflang="pnb" data-title="فاسفورک تیزاب" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%A2%E1%9E%B6%E1%9E%9F%E1%9F%8A%E1%9E%B8%E1%9E%8F%E1%9E%95%E1%9E%BC%E1%9E%9F%E1%9F%92%E1%9E%9C%E1%9E%9A%E1%9E%B7%E1%9E%85" title="អាស៊ីតផូស្វរិច – Khmer" lang="km" hreflang="km" data-title="អាស៊ីតផូស្វរិច" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="Khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Kwas_fosforowy" title="Kwas fosforowy – Polish" lang="pl" hreflang="pl" data-title="Kwas fosforowy" 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/%C3%81cido_fosf%C3%B3rico" title="Ácido fosfórico – Portuguese" lang="pt" hreflang="pt" data-title="Ácido fosfórico" 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/Acid_fosforic" title="Acid fosforic – Romanian" lang="ro" hreflang="ro" data-title="Acid fosforic" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%D1%80%D1%82%D0%BE%D1%84%D0%BE%D1%81%D1%84%D0%BE%D1%80%D0%BD%D0%B0%D1%8F_%D0%BA%D0%B8%D1%81%D0%BB%D0%BE%D1%82%D0%B0" title="Ортофосфорная кислота – Russian" lang="ru" hreflang="ru" data-title="Ортофосфорная кислота" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Phosphoric_acid" title="Phosphoric acid – Simple English" lang="en-simple" hreflang="en-simple" data-title="Phosphoric acid" 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-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Kyselina_trihydrogenfosfore%C4%8Dn%C3%A1" title="Kyselina trihydrogenfosforečná – Slovak" lang="sk" hreflang="sk" data-title="Kyselina trihydrogenfosforečná" 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/Fosforjeva_kislina" title="Fosforjeva kislina – Slovenian" lang="sl" hreflang="sl" data-title="Fosforjeva kislina" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A4%D0%BE%D1%81%D1%84%D0%BE%D1%80%D0%BD%D0%B0_%D0%BA%D0%B8%D1%81%D0%B5%D0%BB%D0%B8%D0%BD%D0%B0" title="Фосфорна киселина – Serbian" lang="sr" hreflang="sr" data-title="Фосфорна киселина" 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/Fosforna_kiselina" title="Fosforna kiselina – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Fosforna kiselina" 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-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Fosforihappo" title="Fosforihappo – Finnish" lang="fi" hreflang="fi" data-title="Fosforihappo" 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/Fosforsyra" title="Fosforsyra – Swedish" lang="sv" hreflang="sv" data-title="Fosforsyra" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AA%E0%AE%BE%E0%AE%9A%E0%AF%81%E0%AE%AA%E0%AE%BE%E0%AE%B0%E0%AE%BF%E0%AE%95%E0%AF%8D_%E0%AE%95%E0%AE%BE%E0%AE%9F%E0%AE%BF" title="பாசுபாரிக் காடி – Tamil" lang="ta" hreflang="ta" data-title="பாசுபாரிக் காடி" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AB%E0%B0%BE%E0%B0%B8%E0%B1%8D%E0%B0%AA%E0%B0%BE%E0%B0%B0%E0%B0%BF%E0%B0%95%E0%B1%8D_%E0%B0%86%E0%B0%AE%E0%B1%8D%E0%B0%B2%E0%B0%82" title="ఫాస్పారిక్ ఆమ్లం – Telugu" lang="te" hreflang="te" data-title="ఫాస్పారిక్ ఆమ్లం" 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%81%E0%B8%A3%E0%B8%94%E0%B8%9F%E0%B8%AD%E0%B8%AA%E0%B8%9F%E0%B8%AD%E0%B8%A3%E0%B8%B4%E0%B8%81" title="กรดฟอสฟอริก – Thai" lang="th" hreflang="th" data-title="กรดฟอสฟอริก" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Fosforik_asit" title="Fosforik asit – Turkish" lang="tr" hreflang="tr" data-title="Fosforik asit" 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%9E%D1%80%D1%82%D0%BE%D1%84%D0%BE%D1%81%D1%84%D0%B0%D1%82%D0%BD%D0%B0_%D0%BA%D0%B8%D1%81%D0%BB%D0%BE%D1%82%D0%B0" title="Ортофосфатна кислота – Ukrainian" lang="uk" hreflang="uk" data-title="Ортофосфатна кислота" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Acid_phosphoric" title="Acid phosphoric – Vietnamese" lang="vi" hreflang="vi" data-title="Acid phosphoric" 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-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Phosphoric_acid" title="Phosphoric acid – Waray" lang="war" hreflang="war" data-title="Phosphoric acid" 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%A3%B7%E9%85%B8" title="磷酸 – Wu" lang="wuu" hreflang="wuu" data-title="磷酸" 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-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%A3%B7%E9%85%B8" title="磷酸 – Cantonese" lang="yue" hreflang="yue" data-title="磷酸" 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%A3%B7%E9%85%B8" title="磷酸 – Chinese" lang="zh" hreflang="zh" data-title="磷酸" 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 href="https://www.wikidata.org/wiki/Special:EntityPage/Q184782#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> 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searchaux" style="display:none">Chemical compound (PO(OH)3)</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output 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 orthophosphoric acid. For other acids commonly called "phosphoric acid", see <a href="/wiki/Phosphoric_acids_and_phosphates" title="Phosphoric acids and phosphates">Phosphoric acids and phosphates</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <a href="/wiki/Phosphorous_acid" title="Phosphorous acid">Phosphorous acid</a>.</div> <p> <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> </p> <table class="infobox ib-chembox"> <caption>Phosphoric acid </caption> <tbody><tr> <td colspan="2" style="text-align:center; padding:2px;"><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Phosphoric-acid-2D-dimensions.svg" class="mw-file-description" title="Structural formula of phosphoric acid, showing dimensions"><img alt="Structural formula of phosphoric acid, showing dimensions" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Phosphoric-acid-2D-dimensions.svg/150px-Phosphoric-acid-2D-dimensions.svg.png" decoding="async" width="150" height="104" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Phosphoric-acid-2D-dimensions.svg/225px-Phosphoric-acid-2D-dimensions.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/98/Phosphoric-acid-2D-dimensions.svg/300px-Phosphoric-acid-2D-dimensions.svg.png 2x" data-file-width="1100" data-file-height="765" /></a><figcaption>Structural formula of phosphoric acid, showing dimensions</figcaption></figure> </td></tr> <tr> <td colspan="2" class="borderless" style="text-align:center"> <table border="0" style="width:100%;display:inline-table;"> <tbody><tr> <td style="border-right:1px solid #aaa; width:50%;"><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Phosphoric-acid-3D-balls.png" class="mw-file-description" title="Ball-and-stick model"><img alt="Ball-and-stick model" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Phosphoric-acid-3D-balls.png/120px-Phosphoric-acid-3D-balls.png" decoding="async" width="120" height="94" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Phosphoric-acid-3D-balls.png/180px-Phosphoric-acid-3D-balls.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/54/Phosphoric-acid-3D-balls.png/240px-Phosphoric-acid-3D-balls.png 2x" data-file-width="1100" data-file-height="866" /></a><figcaption>Ball-and-stick model</figcaption></figure> </td> <td style="width:50%;"><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Phosphoric-acid-3D-vdW.png" class="mw-file-description" title="Space-filling model"><img alt="Space-filling model" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Phosphoric-acid-3D-vdW.png/120px-Phosphoric-acid-3D-vdW.png" decoding="async" width="120" height="112" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Phosphoric-acid-3D-vdW.png/180px-Phosphoric-acid-3D-vdW.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/08/Phosphoric-acid-3D-vdW.png/240px-Phosphoric-acid-3D-vdW.png 2x" data-file-width="1100" data-file-height="1029" /></a><figcaption>Space-filling model</figcaption></figure> </td></tr></tbody></table> </td></tr> <tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Names </th></tr> <tr> <td colspan="2" style="text-align:left;"><a href="/wiki/Chemical_nomenclature" title="Chemical nomenclature">IUPAC name</a> <div style="max-width:22em; word-wrap:break-word; padding-left:1.7em;">Phosphoric acid</div> </td></tr> <tr> <td colspan="2" style="text-align:left;">Other names <div style="max-width:22em; word-wrap:break-word; padding-left:1.7em;">Orthophosphoric acid, hydrogen phosphate</div> </td></tr> <tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Identifiers </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/CAS_Registry_Number" title="CAS Registry Number">CAS Number</a></div> </td> <td><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"><ul><li><span title="commonchemistry.cas.org"><a rel="nofollow" class="external text" href="https://commonchemistry.cas.org/detail?cas_rn=7664-38-2">7664-38-2</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">3D model (<a href="/wiki/JSmol" class="mw-redirect" title="JSmol">JSmol</a>)</div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="chemapps.stolaf.edu (3D interactive model)"><a rel="nofollow" class="external text" href="https://chemapps.stolaf.edu/jmol/jmol.php?model=OP%28%3DO%29%28O%29O">Interactive image</a></span></li></ul></div> </td></tr> <tr> <td><a href="/wiki/ChEBI" title="ChEBI">ChEBI</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="www.ebi.ac.uk"><a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/chebi/searchId.do?chebiId=26078">CHEBI:26078</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><a href="/wiki/ChEMBL" title="ChEMBL">ChEMBL</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="www.ebi.ac.uk"><a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/chembl/explore/compound/ChEMBL1187">ChEMBL1187</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><a href="/wiki/ChemSpider" title="ChemSpider">ChemSpider</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="www.chemspider.com"><a rel="nofollow" class="external text" href="https://www.chemspider.com/Chemical-Structure.979.html">979</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><a href="/wiki/ECHA_InfoCard" class="mw-redirect" title="ECHA InfoCard"><span title="echa.europa.eu">ECHA InfoCard</span></a> </td> <td><a rel="nofollow" class="external text" href="https://echa.europa.eu/substance-information/-/substanceinfo/100.028.758">100.028.758</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q184782#P2566" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span> </td></tr> <tr> <td><a href="/wiki/European_Community_number" title="European Community number"><span title="European Community number (chemical identifier)">EC Number</span></a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>231-633-2</li></ul></div> </td></tr> <tr> <td><a href="/wiki/E_number" title="E number"><span title="E number (food additive code)">E number</span></a> </td> <td>E338 <a href="/wiki/E_number#E300–E399" title="E number">(antioxidants, ...)</a> </td></tr> <tr> <td><a href="/wiki/KEGG" title="KEGG">KEGG</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="www.kegg.jp"><a rel="nofollow" class="external text" href="https://www.kegg.jp/entry/D05467">D05467</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/PubChem" title="PubChem">PubChem</a> <abbr title="Compound ID">CID</abbr></div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="pubchem.ncbi.nlm.nih.gov"><a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/1004">1004</a></span></li></ul></div> </td></tr> <tr> <td><a href="/wiki/RTECS" class="mw-redirect" title="RTECS">RTECS number</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>TB6300000</li></ul></div> </td></tr> <tr> <td><a href="/wiki/Unique_Ingredient_Identifier" title="Unique Ingredient Identifier">UNII</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="precision.fda.gov"><a rel="nofollow" class="external text" href="https://precision.fda.gov/uniisearch/srs/unii/E4GA8884NN">E4GA8884NN</a></span><sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div> </td></tr> <tr> <td><a href="/wiki/UN_number" title="UN number">UN number</a> </td> <td>1805 </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/CompTox_Chemicals_Dashboard" title="CompTox Chemicals Dashboard">CompTox Dashboard</a> <span style="font-weight:normal">(<abbr title="U.S. Environmental Protection Agency">EPA</abbr>)</span></div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><span title="comptox.epa.gov"><a rel="nofollow" class="external text" href="https://comptox.epa.gov/dashboard/chemical/details/DTXSID5024263">DTXSID5024263</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q184782#P3117" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></li></ul></div> </td></tr> <tr> <td colspan="2"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold; text-align:left; font-weight:normal;"><div><a href="/wiki/International_Chemical_Identifier" title="International Chemical Identifier">InChI</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all;"><li style="line-height: inherit; margin: 0"><div style="border-top:1px solid #ccc; padding:0.2em 0 0.2em 1.5em; text-align:left;"><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">InChI=1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)<sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></div><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">Key: NBIIXXVUZAFLBC-UHFFFAOYSA-N<sup> <span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></div></div></li><li style="line-height: inherit; margin: 0"><div style="border-top:1px solid #ccc; padding:0.2em 0 0.2em 1.5em; text-align:left;"><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">InChI=1/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)</div><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">Key: NBIIXXVUZAFLBC-UHFFFAOYAI</div></div></li></ul> </div> </td></tr> <tr> <td colspan="2"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold; text-align:left; font-weight:normal;"><div><a href="/wiki/Simplified_molecular-input_line-entry_system" class="mw-redirect" title="Simplified molecular-input line-entry system">SMILES</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all;"><li style="line-height: inherit; margin: 0"><div style="border-top:1px solid #ccc; padding:0.2em 0 0.2em 1.6em; word-wrap:break-word; text-indent:-1.5em; text-align:left; font-size:97%; line-height:120%;">OP(=O)(O)O</div></li></ul> </div> </td></tr> <tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Properties </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Chemical_formula" title="Chemical formula">Chemical formula</a></div> </td> <td><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">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span>  </td></tr> <tr> <td><a href="/wiki/Molar_mass" title="Molar mass">Molar mass</a> </td> <td><span class="nowrap"><span data-sort-value="7001979940000000000♠"></span>97.994</span> g·mol<sup>−1</sup>   </td></tr> <tr> <td>Appearance </td> <td>Colorless solid </td></tr> <tr> <td><a href="/wiki/Odor" title="Odor">Odor</a> </td> <td>Odorless </td></tr> <tr> <td><a href="/wiki/Density" title="Density">Density</a> </td> <td>1.6845 g/cm<sup>3</sup> (25 °C, 85%),<sup id="cite_ref-Density_85%_1-0" class="reference"><a href="#cite_note-Density_85%-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> 1.834 g/cm<sup>3</sup> (solid)<sup id="cite_ref-Density_solid_2-0" class="reference"><a href="#cite_note-Density_solid-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Melting_point" title="Melting point">Melting point</a> </td> <td>42.35 °C (108.23 °F; 315.50 K) anhydrous<sup id="cite_ref-Greenwood_12-0" class="reference"><a href="#cite_note-Greenwood-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><br />29.32 °C (84.78 °F; 302.47 K) <a href="/wiki/Hemihydrate" title="Hemihydrate">hemihydrate</a><sup id="cite_ref-Ross_13-0" class="reference"><a href="#cite_note-Ross-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Boiling_point" title="Boiling point">Boiling point</a> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>212 °C (414 °F)<sup id="cite_ref-chemspider_3-0" class="reference"><a href="#cite_note-chemspider-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>(only water evaporates)<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li></ul></div> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Aqueous_solution" title="Aqueous solution">Solubility in water</a></div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>392.2 g/(100 g) (−16.3 °C)</li><li>369.4<span class="nowrap"> </span>g/(100 mL) (0.5 °C)</li><li>446 g/(100 mL) (15 °C)<sup id="cite_ref-sioc_5-0" class="reference"><a href="#cite_note-sioc-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></li><li>548<span class="nowrap"> </span>g/(100 mL) (20 °C)<sup id="cite_ref-crc_6-0" class="reference"><a href="#cite_note-crc-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li></ul></div> </td></tr> <tr> <td><a href="/wiki/Solubility" title="Solubility">Solubility</a> </td> <td>Soluble in <a href="/wiki/Ethanol" title="Ethanol">ethanol</a> </td></tr> <tr> <td><a href="/wiki/Partition_coefficient" title="Partition coefficient">log <i>P</i></a> </td> <td>−2.15<sup id="cite_ref-chemsrc_7-0" class="reference"><a href="#cite_note-chemsrc-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Vapor_pressure" title="Vapor pressure">Vapor pressure</a> </td> <td>0.03<span class="nowrap"> </span>mmHg (20<span class="nowrap"> </span>°C)<sup id="cite_ref-PGCH_8-0" class="reference"><a href="#cite_note-PGCH-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Conjugate_base" class="mw-redirect" title="Conjugate base">Conjugate base</a> </td> <td><a href="/wiki/Dihydrogen_phosphate" title="Dihydrogen phosphate">Dihydrogen phosphate</a> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Magnetic_susceptibility" title="Magnetic susceptibility">Magnetic susceptibility</a> (χ)</div> </td> <td>−43.8·10<sup>−6</sup><span class="nowrap"> </span>cm<sup>3</sup>/mol<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Refractive_index" title="Refractive index">Refractive index</a> (<i>n</i><sub>D</sub>)</div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>1.3420 (8.8% w/w <abbr title="aqueous solution">aq. soln.</abbr>)<sup id="cite_ref-Refractive_Index_11-0" class="reference"><a href="#cite_note-Refractive_Index-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></li><li>1.4320 (85% aq. soln) 25 °C</li></ul></div> </td></tr> <tr> <td><a href="/wiki/Viscosity" title="Viscosity">Viscosity</a> </td> <td>2.4–9.4<span class="nowrap"> </span><a href="/wiki/Poise_(unit)" title="Poise (unit)">cP</a> (85% <abbr title="aqueous solution">aq. soln.</abbr>) <br />147 cP (100%) </td></tr> <tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Structure </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Crystal_structure" title="Crystal structure">Crystal structure</a></div> </td> <td>Monoclinic </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Molecular_geometry" title="Molecular geometry">Molecular shape</a></div> </td> <td>Tetrahedral </td></tr> <tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Thermochemistry<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Heat_capacity" title="Heat capacity">Heat capacity</a> <span style="font-size:112%;">(<i>C</i>)</span></div> </td> <td>145.0 J/(mol⋅K) </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Standard_molar_entropy" title="Standard molar entropy">Std molar<br />entropy</a> <span style="font-size:112%;">(<i>S</i><sup>⦵</sup><sub>298</sub>)</span></div> </td> <td>150.8 J/(mol⋅K) </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Standard_enthalpy_change_of_formation" class="mw-redirect" title="Standard enthalpy change of formation">Std enthalpy of<br />formation</a> <span style="font-size:112%;">(Δ<sub>f</sub><i>H</i><sup>⦵</sup><sub>298</sub>)</span></div> </td> <td>−1271.7 kJ/mol </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Gibbs_free_energy#Standard_energy_change_of_formation" title="Gibbs free energy">Gibbs free energy</a> <span style="font-size:112%;">(Δ<sub>f</sub><i>G</i><sup>⦵</sup>)</span></div> </td> <td>−1123.6 kJ/mol </td></tr> <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>: </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><sup id="cite_ref-sigma_15-0" class="reference"><a href="#cite_note-sigma-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</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/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="H290: May be corrosive to metals">H290</abbr>, <abbr class="abbr" title="H314: Causes severe skin burns and eye damage">H314</abbr><sup id="cite_ref-sigma_15-1" class="reference"><a href="#cite_note-sigma-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</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_precautionary_statements" title="GHS precautionary statements">Precautionary statements</a></div> </td> <td><abbr class="abbr" title="P280: Wear protective gloves/protective clothing/eye protection/face protection.">P280</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>, <abbr class="abbr" title="P310: Immediately call a POISON CENTER or doctor/physician.">P310</abbr><sup id="cite_ref-sigma_15-2" class="reference"><a href="#cite_note-sigma-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/NFPA_704" title="NFPA 704"><b>NFPA 704</b></a> (fire diamond) </td> <td><style data-mw-deduplicate="TemplateStyles:r1170367383">.mw-parser-output .nfpa-704-diamond-ref{float:right;padding:1px;text-align:right}.mw-parser-output .nfpa-704-diamond-container{width:82px;font-family:sans-serif;margin:0 auto}.mw-parser-output .nfpa-704-diamond-container-ref{float:left;margin-left:1em}.mw-parser-output .nfpa-704-diamond-images{float:left;font-size:20px;text-align:center;position:relative;height:80px;width:80px;padding:1px}.mw-parser-output .nfpa-704-diamond-map{position:absolute;height:80px;width:80px}.mw-parser-output .nfpa-704-diamond .noresize{margin:0 auto}.mw-parser-output .nfpa-704-diamond-code{line-height:1em;text-align:center;position:absolute}.mw-parser-output .nfpa-704-diamond-code>a{color:black}.mw-parser-output .nfpa-704-diamond-blue{width:13px;top:31px;left:15px}.mw-parser-output .nfpa-704-diamond-red{width:12px;top:12px;left:35px}.mw-parser-output .nfpa-704-diamond-yellow{width:13px;top:31px;left:54px}.mw-parser-output .nfpa-704-diamond-white-image{position:relative;top:51px;left:0}.mw-parser-output .nfpa-704-diamond-white-text{vertical-align:middle;text-align:center;line-height:80%;position:absolute;top:52px}.mw-parser-output .nfpa-704-diamond-white-text a>span{position:absolute;color:black}.mw-parser-output .nfpa-704-diamond-white-wors{font-size:15px;width:23px;left:29px}.mw-parser-output .nfpa-704-diamond-white-wox{font-size:15px;font-stretch:condensed;width:21px;line-height:80%;top:-4px;left:29px}.mw-parser-output .nfpa-704-diamond-white-abcp{font-size:13.5px;font-stretch:condensed;width:28px;left:26px}.mw-parser-output .nfpa-704-diamond-white-ac{font-size:10px;width:30px;left:25px}.mw-parser-output .nfpa-704-diamond-white-strike{text-decoration:line-through}</style><div class="nfpa-704-diamond notheme"><div class="nfpa-704-diamond-container"><div class="nfpa-704-diamond-images nounderlines"> <div class="nfpa-704-diamond-map"><figure class="noresize" typeof="mw:File"><span><img alt="NFPA 704 four-colored diamond" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/NFPA_704.svg/80px-NFPA_704.svg.png" decoding="async" width="80" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/NFPA_704.svg/120px-NFPA_704.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/NFPA_704.svg/160px-NFPA_704.svg.png 2x" data-file-width="512" data-file-height="512" usemap="#ImageMap_7b3d73138c259557" /></span><map name="ImageMap_7b3d73138c259557"><area href="/wiki/NFPA_704#Blue" shape="poly" coords="23,23,47,47,23,70,0,47" alt="Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas" title="Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas" /><area href="/wiki/NFPA_704#Red" shape="poly" coords="47,0,70,23,47,47,23,23" alt="Flammability 0: Will not burn. E.g. water" title="Flammability 0: Will not burn. E.g. water" /><area href="/wiki/NFPA_704#Yellow" shape="poly" coords="70,23,94,47,70,70,47,47" alt="Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen" title="Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen" /><area href="/wiki/NFPA_704#White" shape="poly" coords="47,47,70,70,47,94,23,70" alt="Special hazards (white): no code" title="Special hazards (white): no code" /></map><figcaption></figcaption></figure></div><div class="nfpa-704-diamond-code nfpa-704-diamond-blue"> <a href="/wiki/NFPA_704#Blue" title="NFPA 704"><span title="Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas" class="notheme mw-no-invert">3</span></a></div><div class="nfpa-704-diamond-code nfpa-704-diamond-red"> <a href="/wiki/NFPA_704#Red" title="NFPA 704"><span title="Flammability 0: Will not burn. E.g. water" class="notheme mw-no-invert">0</span></a></div><div class="nfpa-704-diamond-code nfpa-704-diamond-yellow"> <a href="/wiki/NFPA_704#Yellow" title="NFPA 704"><span title="Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen" class="notheme mw-no-invert">0</span></a></div></div></div></div> </td></tr> <tr> <td><a href="/wiki/Flash_point" title="Flash point">Flash point</a> </td> <td>Non-flammable </td></tr> <tr> <td colspan="2" style="text-align:left; background-color:#eaeaea;color:inherit;"><b>Lethal dose</b> or concentration (LD, LC): </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">LD<sub>50</sub> (<a href="/wiki/Lethal_dose#LD50" title="Lethal dose">median dose</a>)</div> </td> <td>1530 mg/kg (rat, oral)<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td colspan="2" style="text-align:left; background-color:#eaeaea;color:inherit;"><a href="/wiki/National_Institute_for_Occupational_Safety_and_Health" title="National Institute for Occupational Safety and Health"><b>NIOSH</b></a> (US health exposure limits): </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Permissible_exposure_limit" title="Permissible exposure limit">PEL</a> (Permissible)</div> </td> <td>TWA 1 mg/m<sup>3</sup><sup id="cite_ref-PGCH_8-1" class="reference"><a href="#cite_note-PGCH-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</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/Recommended_exposure_limit" title="Recommended exposure limit">REL</a> (Recommended)</div> </td> <td>TWA 1 mg/m<sup>3</sup> ST 3 mg/m<sup>3</sup><sup id="cite_ref-PGCH_8-2" class="reference"><a href="#cite_note-PGCH-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</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/IDLH" class="mw-redirect" title="IDLH">IDLH</a> (Immediate danger)</div> </td> <td>1000 mg/m<sup>3</sup><sup id="cite_ref-PGCH_8-3" class="reference"><a href="#cite_note-PGCH-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Safety_data_sheet" title="Safety data sheet">Safety data sheet</a> (SDS) </td> <td><a rel="nofollow" class="external text" href="http://www.inchem.org/documents/icsc/icsc/eics1008.htm">ICSC 1008</a> </td></tr> <tr> <th colspan="2" style="background: #f8eaba;color:inherit; text-align: center;">Related compounds </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Related <a href="/wiki/Phosphorus" title="Phosphorus">phosphorus</a> <a href="/wiki/Oxoacid" class="mw-redirect" title="Oxoacid">oxoacids</a></div> </td> <td><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><a href="/wiki/Hypophosphorous_acid" title="Hypophosphorous acid">Hypophosphorous acid</a></li><li><a href="/wiki/Phosphorous_acid" title="Phosphorous acid">Phosphorous acid</a></li><li><a href="/wiki/Pyrophosphoric_acid" title="Pyrophosphoric acid">Pyrophosphoric acid</a></li><li><a href="/wiki/Triphosphoric_acid" title="Triphosphoric acid">Triphosphoric acid</a></li><li><a href="/wiki/Peroxomonophosphoric_acid" class="mw-redirect" title="Peroxomonophosphoric acid">Peroxomonophosphoric acid</a></li><li><a href="/wiki/Peroxodiphosphoric_acid" class="mw-redirect" title="Peroxodiphosphoric acid">Peroxodiphosphoric acid</a></li></ul></div> </td></tr> <tr> <td colspan="2" style="text-align:left; background:#f8eaba; color:inherit; border:1px solid #a2a9b1;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Except where otherwise noted, data are given for materials in their <a href="/wiki/Standard_state" title="Standard state">standard state</a> (at 25 °C [77 °F], 100 kPa).</div> <div style="margin-top: 0.3em;"><div style="text-align:center;"><span typeof="mw:File"><span><img alt="☒" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/12px-X_mark.svg.png" decoding="async" width="12" height="14" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/18px-X_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/24px-X_mark.svg.png 2x" data-file-width="525" data-file-height="600" /></span></span><span style="display:none">N</span> <span class="reflink plainlinks nourlexpansion"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Special:ComparePages&rev1=470622096&page2=Phosphoric+acid">verify</a></span> (<a href="/wiki/Wikipedia:WikiProject_Chemicals/Chembox_validation" title="Wikipedia:WikiProject Chemicals/Chembox validation">what is</a> <sup><span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span><span typeof="mw:File"><span><img alt="☒" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/7px-X_mark.svg.png" decoding="async" width="7" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/11px-X_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/14px-X_mark.svg.png 2x" data-file-width="525" data-file-height="600" /></span></span><span style="display:none">N</span></sup> ?) </div></div> <div style="margin-top: 0.3em; text-align: center;"><a href="/wiki/Wikipedia:Chemical_infobox#References" title="Wikipedia:Chemical infobox">Infobox references</a></div> </td></tr> </tbody></table><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Chemical compound</div> <p><b>Phosphoric acid</b> (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is a colorless, odorless <a href="/wiki/Phosphorus" title="Phosphorus">phosphorus</a>-containing <a href="/wiki/Solid" title="Solid">solid</a>, and <a href="/wiki/Inorganic_compound" title="Inorganic compound">inorganic compound</a> with the <a href="/wiki/Chemical_formula" title="Chemical formula">chemical formula</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap"><a href="/wiki/Hydrogen" title="Hydrogen">H</a><sub class="template-chem2-sub">3</sub><a href="/wiki/Phosphorus" title="Phosphorus">P</a><a href="/wiki/Oxygen" title="Oxygen">O</a><sub class="template-chem2-sub">4</sub></span>. It is commonly encountered as an 85% <a href="/wiki/Aqueous_solution" title="Aqueous solution">aqueous solution</a>, which is a colourless, odourless, and non-<a href="/wiki/Volatility_(chemistry)" title="Volatility (chemistry)">volatile</a> syrupy liquid. It is a major industrial chemical, being a component of many fertilizers. </p><p>The compound is an <a href="/wiki/Acid" title="Acid">acid</a>. Removal of all three <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sup class="template-chem2-sup">+</sup></span> ions gives the <a href="/wiki/Phosphate" title="Phosphate">phosphate</a> ion <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">PO<span class="template-chem2-su"><span>3−</span><span>4</span></span></span>. Removal of one or two protons gives <a href="/wiki/Phosphate" title="Phosphate">dihydrogen phosphate</a> ion <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>PO<span class="template-chem2-su"><span>−</span><span>4</span></span></span>, and the <a href="/wiki/Phosphate" title="Phosphate">hydrogen phosphate</a> ion <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">HPO<span class="template-chem2-su"><span>2−</span><span>4</span></span></span>, respectively. Phosphoric acid forms <a href="/wiki/Esters" class="mw-redirect" title="Esters">esters</a>, called <a href="/wiki/Organophosphate" title="Organophosphate">organophosphates</a>.<sup id="cite_ref-Westheimer_17-0" class="reference"><a href="#cite_note-Westheimer-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p><p>The name "orthophosphoric acid" can be used to distinguish this specific acid from other "<a href="/wiki/Phosphoric_acids_and_phosphates" title="Phosphoric acids and phosphates">phosphoric acids</a>", such as <a href="/wiki/Pyrophosphoric_acid" title="Pyrophosphoric acid">pyrophosphoric acid</a>. Nevertheless, the term "phosphoric acid" often means this specific compound; and that is the current <a href="/wiki/IUPAC_nomenclature" class="mw-redirect" title="IUPAC nomenclature">IUPAC nomenclature</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Production"><span class="anchor" id="Manufacture"></span>Production</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=1" title="Edit section: Production"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Phosphoric acid is produced industrially by one of two routes, wet processes and dry.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Wet_process">Wet process</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=2" title="Edit section: Wet process"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the wet process, a phosphate-containing mineral such as calcium <a href="/wiki/Hydroxyapatite" title="Hydroxyapatite">hydroxyapatite</a> and <a href="/wiki/Fluorapatite" title="Fluorapatite">fluorapatite</a> are treated with <a href="/wiki/Sulfuric_acid" title="Sulfuric acid">sulfuric acid</a>.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p> <dl><dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Ca<sub class="template-chem2-sub">5</sub>(PO<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>OH + 5 H<sub class="template-chem2-sub">2</sub>SO<sub class="template-chem2-sub">4</sub> → 3 H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub> + 5 <a href="/wiki/CaSO4" class="mw-redirect" title="CaSO4">CaSO<sub class="template-chem2-sub">4</sub></a> + H<sub class="template-chem2-sub">2</sub>O</span></dd> <dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Ca<sub class="template-chem2-sub">5</sub>(PO<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>F + 5 H<sub class="template-chem2-sub">2</sub>SO<sub class="template-chem2-sub">4</sub> → 3 H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub> + 5 <a href="/wiki/CaSO4" class="mw-redirect" title="CaSO4">CaSO<sub class="template-chem2-sub">4</sub></a> + HF</span></dd></dl> <p><a href="/wiki/Calcium_sulfate" title="Calcium sulfate">Calcium sulfate</a> (gypsum, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">CaSO<sub class="template-chem2-sub">4</sub></span>) is a by-product, which is removed as <a href="/wiki/Phosphogypsum" title="Phosphogypsum">phosphogypsum</a>. The <a href="/wiki/Hydrogen_fluoride" title="Hydrogen fluoride">hydrogen fluoride</a> (HF) gas is streamed into a <a href="/wiki/Wet_scrubber" title="Wet scrubber">wet (water) scrubber</a> producing <a href="/wiki/Hydrofluoric_acid" title="Hydrofluoric acid">hydrofluoric acid</a>. In both cases the phosphoric acid solution usually contains 23–33% <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></span> (32–46% <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span>). It may be concentrated to produce <i>commercial-</i> or <i>merchant-grade</i> phosphoric acid, which contains about 54–62% <a href="/wiki/Phosphorus_pentoxide" title="Phosphorus pentoxide"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></span></a> (75–85% <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span>). Further removal of water yields <i>superphosphoric acid</i> with a <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></span> concentration above 70% (corresponding to nearly 100% <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span>). The phosphoric acid from both processes may be further purified by removing compounds of arsenic and other potentially toxic impurities. </p> <div class="mw-heading mw-heading3"><h3 id="Dry_process">Dry process</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=3" title="Edit section: Dry process"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>To produce food-grade phosphoric acid, phosphate ore is first reduced with <a href="/wiki/Coke_(fuel)" title="Coke (fuel)">coke</a> in an <a href="/wiki/Electric_arc_furnace" title="Electric arc furnace">electric arc furnace</a>, to give elemental <a href="/wiki/Phosphorus" title="Phosphorus">phosphorus</a>. This process is also known as the thermal process or the electric furnace process. Silica is also added, resulting in the production of <a href="/wiki/Calcium_silicate" title="Calcium silicate">calcium silicate</a> slag. Elemental phosphorus is distilled out of the furnace and burned with air to produce high-purity <a href="/wiki/Phosphorus_pentoxide" title="Phosphorus pentoxide">phosphorus pentoxide</a>, which is dissolved in water to make phosphoric acid.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> The thermal process produces phosphoric acid with a very high concentration of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></span> (about 85%) and a low level of impurities. </p><p>However, this process is more expensive and energy-intensive than the wet process, which produces phosphoric acid with a lower concentration of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></span> (about 26-52%) and a higher level of impurities. The wet process is the most common method of producing phosphoric acid for fertilizer use.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Even in China, where the thermal process is still used quite widely due to relatively cheap coal as opposed to the sulfuric acid, over 7/8 of phosphoric acid is produced with wet process.<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Purification">Purification</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=4" title="Edit section: Purification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Phosphoric acids produced from <a href="/wiki/Phosphate_rock" class="mw-redirect" title="Phosphate rock">phosphate rock</a> or thermal processes often requires purification. A common purification methods is liquid-liquid extraction, which involves the separation of phosphoric acids from water and other impurities using organic solvents, such as <a href="/wiki/Tributyl_phosphate" title="Tributyl phosphate">tributyl phosphate</a> (TBP), <a href="/wiki/Methyl_isobutyl_ketone" title="Methyl isobutyl ketone">methyl isobutyl ketone</a> (MIBK), or <a href="/wiki/N-octanol" class="mw-redirect" title="N-octanol"><i>n</i>-octanol</a>. Nanofiltration involves the use of a premodified nanofiltration membrane, which is functionalized by a deposit of a high molecular weight polycationic polymer of polyethyleneimines. Nanofiltration has been shown to significantly reduce the concentrations of various impurities, including cadmium, aluminum, iron, and rare earth elements. The laboratory and industrial pilot scale results showed that this process allows the production of food-grade phosphoric acid.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </p><p>Fractional crystallization can achieve highest purities typically used for semiconductor applications. Usually a static crystallizer is used. A static crystallizer uses vertical plates, which are suspended in the molten feed and which are alternatingly cooled and heated by a heat transfer medium. The process begins with the slow cooling of the heat transfer medium below the freezing point of the stagnant melt. This cooling causes a layer of crystals to grow on the plates. Impurities are rejected from the growing crystals and are concentrated in the remaining melt. After the desired fraction has been crystallized, the remaining melt is drained from the crystallizer. The purer crystalline layer remains adhered to the plates. In a subsequent step, the plates are heated again to liquify the crystals and the purified phosphoric acid drained into the product vessel. The crystallizer is filled with feed again and the next cooling cycle is started.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Properties">Properties</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=5" title="Edit section: Properties"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Acidic_properties">Acidic properties</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=6" title="Edit section: Acidic properties"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In aqueous solution phosphoric acid behaves as a triprotic acid. </p> <dl><dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub> ⇌ H<sub class="template-chem2-sub">2</sub>PO<span class="template-chem2-su"><span>−</span><span>4</span></span> + H<sup class="template-chem2-sup">+</sup></span>, p<i>K</i><sub>a1</sub> = 2.14</dd> <dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>PO<span class="template-chem2-su"><span>−</span><span>4</span></span> ⇌ HPO<span class="template-chem2-su"><span>2−</span><span>4</span></span> + H<sup class="template-chem2-sup">+</sup></span>, p<i>K</i><sub>a2</sub> = 7.20</dd> <dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">HPO<span class="template-chem2-su"><span>2−</span><span>4</span></span> ⇌ PO<span class="template-chem2-su"><span>3−</span><span>4</span></span> + H<sup class="template-chem2-sup">+</sup></span>, p<i>K</i><sub>a3</sub> = 12.37</dd></dl> <p>The difference between successive <a href="/wiki/PKa" class="mw-redirect" title="PKa">p<i>K</i><sub>a</sub></a> values is sufficiently large so that salts of either monohydrogen phosphate, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">HPO<span class="template-chem2-su"><span>2−</span><span>4</span></span></span> or dihydrogen phosphate, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>PO<span class="template-chem2-su"><span>−</span><span>4</span></span></span>, can be prepared from a solution of phosphoric acid by adjusting the <a href="/wiki/PH" title="PH">pH</a> to be mid-way between the respective p<i>K</i><sub>a</sub> values. </p> <div class="mw-heading mw-heading3"><h3 id="Aqueous_solutions">Aqueous solutions</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=7" title="Edit section: Aqueous solutions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Aqueous solutions up to 62.5% <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span> are <a href="/wiki/Eutectic" class="mw-redirect" title="Eutectic">eutectic</a>, exhibiting freezing-point depression as low as -85°C. When the concentration of acid rises above 62.5% the freezing-point increases, reaching 21°C by 85% <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span> (w/w; the <a href="/wiki/Monohydrate" class="mw-redirect" title="Monohydrate">monohydrate</a>). Beyond this the <a href="/wiki/Phase_diagram" title="Phase diagram">phase diagram</a> becomes complicated, with significant local maxima and minima. For this reason phosphoric acid is rarely sold above 85%, as beyond this adding or removing small amounts moisture risks the entire mass freezing solid, which would be a major problem on a large scale. A local maximum at 91.6% which corresponds to the <a href="/wiki/Hemihydrate" title="Hemihydrate">hemihydrate</a> 2H<sub>3</sub>PO<sub>4</sub>•H<sub>2</sub>O, freezing at 29.32°C.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> There is a second smaller eutectic depression at a concentration of 94.75% with a freezing point of 23.5°C. At higher concentrations the freezing point rapidly increases. Concentrated phosphoric acid tends to <a href="/wiki/Supercooling" title="Supercooling">supercool</a> before crystallization occurs, and may be relatively resistant to crystallisation even when stored below the freezing point.<sup id="cite_ref-Ross_13-1" class="reference"><a href="#cite_note-Ross-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Self_condensation">Self condensation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=8" title="Edit section: Self condensation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Phosphoric acid is commercially available as aqueous solutions of various concentrations, not usually exceeding 85%. If concentrated further it undergoes slow self-condensation, forming an equilibrium with <a href="/wiki/Pyrophosphoric_acid" title="Pyrophosphoric acid">pyrophosphoric acid</a>: </p> <dl><dd><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">2 H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub> ⇌ H<sub class="template-chem2-sub">2</sub>O + H<sub class="template-chem2-sub">4</sub>P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">7</sub></span></dd></dl> <p>Even at 90% concentration the amount of pyrophosphoric acid present is negligible, but beyond 95% it starts to increase, reaching 15% at what would have otherwise been 100% orthophosphoric acid.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> </p><p>As the concentration is increased <a href="/wiki/Phosphoric_acids_and_phosphates" title="Phosphoric acids and phosphates">higher acids</a> are formed, culminating in the formation of <a href="/wiki/Polyphosphoric_acid" class="mw-redirect" title="Polyphosphoric acid">polyphosphoric acids</a>.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> It is not possible to fully dehydrate phosphoric acid to <a href="/wiki/Phosphorus_pentoxide" title="Phosphorus pentoxide">phosphorus pentoxide</a>, instead the polyphosphoric acid becomes increasingly polymeric and viscous. Due to the self-condensation, pure orthophosphoric acid can only be obtained by a careful fractional freezing/melting process.<sup id="cite_ref-Ross_13-2" class="reference"><a href="#cite_note-Ross-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Greenwood_12-1" class="reference"><a href="#cite_note-Greenwood-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Uses">Uses</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=9" title="Edit section: Uses"><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/Phosphorus#Food_additive" title="Phosphorus">Phosphorus § Food additive</a></div> <p>The dominant use of phosphoric acid is for <a href="/wiki/Fertilizer" title="Fertilizer">fertilizers</a>, consuming approximately 90% of production.<sup id="cite_ref-Ullmann_31-0" class="reference"><a href="#cite_note-Ullmann-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable"> <tbody><tr> <th>Application </th> <th>Demand (2006) in thousands of tons </th> <th>Main phosphate derivatives </th></tr> <tr> <td>Soaps and detergents</td> <td>1836</td> <td><a href="/wiki/Sodium_triphosphate" title="Sodium triphosphate">STPP</a> </td></tr> <tr> <td>Food industry</td> <td>309</td> <td><a href="/wiki/Sodium_triphosphate" title="Sodium triphosphate">STPP</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Na<sub class="template-chem2-sub">5</sub>P<sub class="template-chem2-sub">3</sub>O<sub class="template-chem2-sub">10</sub></span>), <a href="/wiki/Sodium_hexametaphosphate" title="Sodium hexametaphosphate">SHMP</a>, <a href="/wiki/Trisodium_phosphate" title="Trisodium phosphate">TSP</a>, <a href="/wiki/Disodium_pyrophosphate" title="Disodium pyrophosphate">SAPP</a>, <a href="/wiki/Sodium_aluminium_phosphate" title="Sodium aluminium phosphate">SAlP</a>, <a href="/wiki/Monocalcium_phosphate" title="Monocalcium phosphate">MCP</a>, <a href="/wiki/Disodium_phosphate" title="Disodium phosphate">DSP</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Na<sub class="template-chem2-sub">2</sub>HPO<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">3</sub>PO<sub class="template-chem2-sub">4</sub></span> </td></tr> <tr> <td><a href="/wiki/Water_treatment" title="Water treatment">Water treatment</a></td> <td>164</td> <td>SHMP, <a href="/wiki/Sodium_triphosphate" title="Sodium triphosphate">STPP</a>, <a href="/wiki/Tetrasodium_pyrophosphate" title="Tetrasodium pyrophosphate">TSPP</a>, <a href="/wiki/Monosodium_phosphate" title="Monosodium phosphate">MSP</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">NaH<sub class="template-chem2-sub">2</sub>PO<sub class="template-chem2-sub">4</sub></span>), DSP </td></tr> <tr> <td><a href="/wiki/Toothpaste" title="Toothpaste">Toothpastes</a></td> <td>68</td> <td><a href="/wiki/Dicalcium_phosphate" title="Dicalcium phosphate">DCP</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">CaHPO<sub class="template-chem2-sub">4</sub></span>), IMP, <a href="/wiki/SMFP" class="mw-redirect" title="SMFP">SMFP</a> </td></tr> <tr> <td>Other applications</td> <td>287</td> <td><a href="/wiki/Sodium_triphosphate" title="Sodium triphosphate">STPP</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Na<sub class="template-chem2-sub">3</sub>P<sub class="template-chem2-sub">3</sub>O<sub class="template-chem2-sub">9</sub></span>), TCP, APP, DAP, <a href="/wiki/Zinc_phosphate" title="Zinc phosphate">zinc phosphate</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Zn<sub class="template-chem2-sub">3</sub>(PO<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">2</sub></span>), <a href="/wiki/Aluminium_phosphate" title="Aluminium phosphate">aluminium phosphate</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">AlPO<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">3</sub>PO<sub class="template-chem2-sub">4</sub></span> </td></tr></tbody></table> <p>Food-grade phosphoric acid (additive <a href="/wiki/E_number" title="E number">E338</a><sup id="cite_ref-fgovuk_32-0" class="reference"><a href="#cite_note-fgovuk-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup>) is used to acidify foods and beverages such as various <a href="/wiki/Cola" title="Cola">colas</a> and jams, providing a tangy or sour taste. The phosphoric acid also serves as a <a href="/wiki/Preservative" title="Preservative">preservative</a>.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> Soft drinks containing phosphoric acid, which would include <a href="/wiki/Coca-Cola" title="Coca-Cola">Coca-Cola</a>, are sometimes called <a href="/wiki/Phosphate_soda" title="Phosphate soda">phosphate sodas</a> or phosphates. Phosphoric acid in soft drinks has the potential to cause dental erosion.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> Phosphoric acid also has the potential to contribute to the formation of <a href="/wiki/Kidney_stone_disease" title="Kidney stone disease">kidney stones</a>, especially in those who have had kidney stones previously.<sup id="cite_ref-Qa2014_35-0" class="reference"><a href="#cite_note-Qa2014-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p><p>Specific applications of phosphoric acid include: </p> <ul><li>in anti-rust treatment by <a href="/wiki/Phosphate_conversion_coating" title="Phosphate conversion coating">phosphate conversion coating</a> or <a href="/wiki/Passivation_(chemistry)" title="Passivation (chemistry)">passivation</a></li> <li>to prevent <a href="/wiki/Iron" title="Iron">iron</a> <a href="/wiki/Oxidation" class="mw-redirect" title="Oxidation">oxidation</a> by means of the <a href="/wiki/Parkerization_(metallurgy)" class="mw-redirect" title="Parkerization (metallurgy)">Parkerization</a> process</li> <li>as an external standard for <a href="/wiki/Phosphorus-31_nuclear_magnetic_resonance" title="Phosphorus-31 nuclear magnetic resonance">phosphorus-31 nuclear magnetic resonance</a></li> <li>in <a href="/wiki/Phosphoric_acid_fuel_cell" title="Phosphoric acid fuel cell">phosphoric acid fuel cells</a></li> <li>in <a href="/wiki/Activated_carbon" title="Activated carbon">activated carbon</a> production<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup></li> <li>in <a href="/wiki/Compound_semiconductor" class="mw-redirect" title="Compound semiconductor">compound semiconductor</a> processing, to etch <a href="/wiki/Indium_gallium_arsenide" title="Indium gallium arsenide">Indium gallium arsenide</a> selectively with respect to <a href="/wiki/Indium_phosphide" title="Indium phosphide">indium phosphide</a><sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup></li> <li>in <a href="/wiki/Microfabrication" title="Microfabrication">microfabrication</a> to etch <a href="/wiki/Silicon_nitride" title="Silicon nitride">silicon nitride</a> selectively with respect to <a href="/wiki/Silicon_dioxide" title="Silicon dioxide">silicon dioxide</a><sup id="cite_ref-Wolf_38-0" class="reference"><a href="#cite_note-Wolf-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup></li> <li>in <a href="/wiki/Microfabrication" title="Microfabrication">microfabrication</a> to etch <a href="/wiki/Aluminium" title="Aluminium">aluminium</a></li> <li>as a pH adjuster in cosmetics and skin-care products<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup></li> <li>as a sanitizing agent in the dairy, food, and brewing industries<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup></li></ul> <p>Phosphoric acid may also be used for <a href="/wiki/Chemical-mechanical_polishing" title="Chemical-mechanical polishing">chemical polishing</a> (<a href="/wiki/Etching" title="Etching">etching</a>) of metals like aluminium or for <a href="/wiki/Passivation_(chemistry)" title="Passivation (chemistry)">passivation</a> of steel products in a process called <a href="/wiki/Phosphate_conversion_coating" title="Phosphate conversion coating">phosphatization</a>.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Safety">Safety</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=10" title="Edit section: Safety"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Phosphoric acid is not a <a href="/wiki/Strong_acid" class="mw-redirect" title="Strong acid">strong acid</a>. However, at moderate concentrations phosphoric acid solutions are irritating to the skin. Contact with concentrated solutions can cause severe skin burns and permanent eye damage.<sup id="cite_ref-:0_42-0" class="reference"><a href="#cite_note-:0-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> </p><p>A link has been shown between long-term regular cola intake and <a href="/wiki/Osteoporosis" title="Osteoporosis">osteoporosis</a> in later middle age in women (but not men).<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</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=Phosphoric_acid&action=edit&section=11" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Phosphate <a href="/wiki/Fertilizer" title="Fertilizer">fertilizers</a>, such as <a href="/wiki/Ammonium_phosphate" title="Ammonium phosphate">ammonium phosphate</a> fertilizers</li> <li><a href="/wiki/Chiral_phosphoric_acid" title="Chiral phosphoric acid">Chiral phosphoric acid</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=Phosphoric_acid&action=edit&section=12" 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-Density_85%-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Density_85%_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 id="CITEREFChristensen,_J._H.Reed,_R._B.1955" class="citation journal cs1">Christensen, J. H.; Reed, R. B. (1955). "Design and Analysis Data—Density of Aqueous Solutions of Phosphoric Acid Measurements at 25 °C". <i>Ind. Eng. Chem</i>. <b>47</b> (6): <span class="nowrap">1277–</span>1280. <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%2Fie50546a061">10.1021/ie50546a061</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Ind.+Eng.+Chem.&rft.atitle=Design+and+Analysis+Data%E2%80%94Density+of+Aqueous+Solutions+of+Phosphoric+Acid+Measurements+at+25+%C2%B0C.&rft.volume=47&rft.issue=6&rft.pages=%3Cspan+class%3D%22nowrap%22%3E1277-%3C%2Fspan%3E1280&rft.date=1955&rft_id=info%3Adoi%2F10.1021%2Fie50546a061&rft.au=Christensen%2C+J.+H.&rft.au=Reed%2C+R.+B.&rfr_id=info%3Asid%2Fen.wikipedia.org%3APhosphoric+acid" class="Z3988"></span></span> </li> <li id="cite_note-Density_solid-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-Density_solid_2-0">^</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/4231">"CAMEO Chemicals Datasheet – Phosphoric Acid"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190815155917/https://cameochemicals.noaa.gov/chemical/4231">Archived</a> from the original on 15 August 2019<span class="reference-accessdate">. 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Retrieved <span class="nowrap">2 June</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Solubilities+of+Inorganic+and+Organic+Compounds&rft.pub=Van+Nostrand&rft.date=1952&rft.aulast=Seidell&rft.aufirst=Atherton&rft.au=Linke%2C+William+F.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dk2e5AAAAIAAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3APhosphoric+acid" class="Z3988"></span></span> </li> <li id="cite_note-crc-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-crc_6-0">^</a></b></span> <span class="reference-text">Haynes, p. 4.80</span> </li> <li id="cite_note-chemsrc-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-chemsrc_7-0">^</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://www.chemsrc.com/en/cas/7664-38-2_329226.html">"phosphoric acid_msds"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170704022858/http://www.chemsrc.com/en/cas/7664-38-2_329226.html">Archived</a> from the original on 4 July 2017<span class="reference-accessdate">. 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Retrieved <span class="nowrap">16 January</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Sigma-Aldrich&rft.atitle=Phosphoric+Acid%2C+85+wt.%25+SDS&rft.date=2016-05-05&rft_id=http%3A%2F%2Fwww.sigmaaldrich.com%2FMSDS%2FMSDS%2FDisplayMSDSPage.do%3Fcountry%3DUS%26language%3Den%26productNumber%3D345245%26brand%3DALDRICH%26PageToGoToURL%3Dhttp%253A%252F%252Fwww.sigmaaldrich.com%252Fcatalog%252Fproduct%252Faldrich%252F345245%253Flang%253Den&rfr_id=info%3Asid%2Fen.wikipedia.org%3APhosphoric+acid" class="Z3988"></span></span> </li> <li id="cite_note-43"><span class="mw-cite-backlink"><b><a href="#cite_ref-43">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFTuckerMoritaQiaoHannan2006" class="citation journal cs1">Tucker KL, Morita K, Qiao N, Hannan MT, Cupples LA, Kiel DP (1 October 2006). <a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fajcn%2F84.4.936">"Colas, but not other carbonated beverages, are associated with low bone mineral density in older women: The Framingham Osteoporosis Study"</a>. <i>American Journal of Clinical Nutrition</i>. <b>84</b> (4): <span class="nowrap">936–</span>942. <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/10.1093%2Fajcn%2F84.4.936">10.1093/ajcn/84.4.936</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/17023723">17023723</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=American+Journal+of+Clinical+Nutrition&rft.atitle=Colas%2C+but+not+other+carbonated+beverages%2C+are+associated+with+low+bone+mineral+density+in+older+women%3A+The+Framingham+Osteoporosis+Study&rft.volume=84&rft.issue=4&rft.pages=%3Cspan+class%3D%22nowrap%22%3E936-%3C%2Fspan%3E942&rft.date=2006-10-01&rft_id=info%3Adoi%2F10.1093%2Fajcn%2F84.4.936&rft_id=info%3Apmid%2F17023723&rft.aulast=Tucker&rft.aufirst=KL&rft.au=Morita%2C+K&rft.au=Qiao%2C+N&rft.au=Hannan%2C+MT&rft.au=Cupples%2C+LA&rft.au=Kiel%2C+DP&rft_id=https%3A%2F%2Fdoi.org%2F10.1093%252Fajcn%252F84.4.936&rfr_id=info%3Asid%2Fen.wikipedia.org%3APhosphoric+acid" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Cited_sources">Cited sources</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phosphoric_acid&action=edit&section=13" title="Edit section: Cited sources"><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="CITEREFHaynes,_William_M.2011" class="citation book cs1">Haynes, William M., ed. 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External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style 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.navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Hydrogen_compounds" title="Template:Hydrogen compounds"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Hydrogen_compounds" title="Template talk:Hydrogen compounds"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Hydrogen_compounds" title="Special:EditPage/Template:Hydrogen compounds"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Hydrogen_compounds22" style="font-size:114%;margin:0 4em"><a href="/wiki/Hydrogen_compounds" title="Hydrogen compounds">Hydrogen compounds</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arsenous_acid" title="Arsenous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>AsO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Arsenic_acid" title="Arsenic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>AsO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Argon_fluorohydride" title="Argon fluorohydride">HArF</a></li> <li><a href="/wiki/Hydrogen_astatide" title="Hydrogen astatide">HAt</a></li> <li><a href="/wiki/Fluorosulfuric_acid" title="Fluorosulfuric acid"><span class="chemf nowrap">HSO<sub class="template-chem2-sub">3</sub>F</span></a></li> <li><a href="/wiki/Fluoroboric_acid" title="Fluoroboric acid"><span class="chemf nowrap">H[BF<sub class="template-chem2-sub">4</sub>]</span></a></li> <li><a href="/wiki/Hydrogen_bromide" title="Hydrogen bromide">HBr</a></li> <li><a href="/wiki/Hypobromous_acid" title="Hypobromous acid">HBrO</a></li> <li><a href="/wiki/Bromous_acid" title="Bromous acid"><span class="chemf nowrap">HBrO<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Bromic_acid" title="Bromic acid"><span class="chemf nowrap">HBrO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Perbromic_acid" title="Perbromic acid"><span class="chemf nowrap">HBrO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Hydrogen_chloride" title="Hydrogen chloride">HCl</a></li> <li><a href="/wiki/Hypochlorous_acid" title="Hypochlorous acid">HClO</a></li> <li><a href="/wiki/Chlorous_acid" title="Chlorous acid"><span class="chemf nowrap">HClO<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Chloric_acid" title="Chloric acid"><span class="chemf nowrap">HClO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Perchloric_acid" title="Perchloric acid"><span class="chemf nowrap">HClO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Hydrogen_cyanide" title="Hydrogen cyanide">HCN</a></li> <li><a href="/wiki/Fulminic_acid" title="Fulminic acid">HCNO</a></li> <li><a href="/wiki/Chromic_acid" title="Chromic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>CrO<sub class="template-chem2-sub">4</sub></span>/<span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Cr<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">7</sub></span></a></li> <li><a href="/wiki/Carbonic_acid" title="Carbonic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>CO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Thiocarbonic_acid" title="Thiocarbonic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>CS<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Hydrogen_fluoride" title="Hydrogen fluoride">HF</a></li> <li><a href="/wiki/Hypofluorous_acid" title="Hypofluorous acid">HFO</a></li> <li><a href="/wiki/Hydrogen_iodide" title="Hydrogen iodide">HI</a></li> <li><a href="/wiki/Hypoiodous_acid" title="Hypoiodous acid">HIO</a></li> <li><a href="/wiki/Iodous_acid" title="Iodous acid"><span class="chemf nowrap">HIO<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Iodic_acid" title="Iodic acid"><span class="chemf nowrap">HIO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Periodic_acid" title="Periodic acid"><span class="chemf nowrap">HIO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Permanganic_acid" title="Permanganic acid"><span class="chemf nowrap">HMnO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Manganic_acid" class="mw-redirect" title="Manganic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>MnO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Molybdic_acid" title="Molybdic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>MoO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Hydrogen_isocyanide" title="Hydrogen isocyanide">HNC</a></li> <li><a href="/wiki/Sodium_bicarbonate" title="Sodium bicarbonate"><span class="chemf nowrap">NaHCO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Isocyanic_acid" title="Isocyanic acid">HNCO</a></li> <li><a href="/wiki/Nitroxyl" title="Nitroxyl">HNO</a></li> <li><a href="/wiki/Nitrous_acid" title="Nitrous acid"><span class="chemf nowrap">HNO<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Nitric_acid" title="Nitric acid"><span class="chemf nowrap">HNO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Hyponitrous_acid" title="Hyponitrous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>N<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Nitrosylsulfuric_acid" title="Nitrosylsulfuric acid"><span class="chemf nowrap">HNO<sub class="template-chem2-sub">5</sub>S</span></a></li> <li><a href="/wiki/Sulfamic_acid" title="Sulfamic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>NSO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Properties_of_water" title="Properties of water"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O</span></a></li> <li><a href="/wiki/Hydrogen_peroxide" title="Hydrogen peroxide"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Trioxidane" title="Trioxidane"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Tetraoxidane" title="Tetraoxidane"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Pentaoxidane" title="Pentaoxidane"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">5</sub></span></a></li> <li><a href="/wiki/Hypophosphorous_acid" title="Hypophosphorous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Phosphorous_acid" title="Phosphorous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a class="mw-selflink selflink"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>PO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Pyrophosphoric_acid" title="Pyrophosphoric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">4</sub>P<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">7</sub></span></a></li> <li><a href="/wiki/Triphosphoric_acid" title="Triphosphoric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">5</sub>P<sub class="template-chem2-sub">3</sub>O<sub class="template-chem2-sub">10</sub></span></a></li> <li><a href="/wiki/Chloroplatinic_acid" title="Chloroplatinic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>[PtCl<sub class="template-chem2-sub">6</sub>]</span></a></li> <li><a href="/wiki/Hydrogen_sulfide" title="Hydrogen sulfide"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S</span></a></li> <li><a href="/wiki/Hydrogen_disulfide" title="Hydrogen disulfide"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub></span></a></li> <li><a href="/wiki/Hydrogen_selenide" title="Hydrogen selenide"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Se</span></a></li> <li><a href="/wiki/Selenous_acid" title="Selenous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>SeO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Selenic_acid" title="Selenic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>SeO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Silicic_acid" title="Silicic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">4</sub>SiO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Hexafluorosilicic_acid" title="Hexafluorosilicic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>[SiF<sub class="template-chem2-sub">6</sub>]</span></a></li> <li><a href="/wiki/Thiocyanic_acid" title="Thiocyanic acid">HSCN</a></li> <li><a href="/wiki/Isothiocyanic_acid" class="mw-redirect" title="Isothiocyanic acid">HNCS</a></li> <li><a href="/wiki/Sulfurous_acid" title="Sulfurous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>SO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Sulfuric_acid" title="Sulfuric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>SO<sub class="template-chem2-sub">4</sub></span></a></li> <li><a href="/wiki/Peroxymonosulfuric_acid" title="Peroxymonosulfuric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>SO<sub class="template-chem2-sub">5</sub></span></a></li> <li><a href="/wiki/Thiosulfuric_acid" title="Thiosulfuric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">3</sub></span></a></li> <li><a href="/wiki/Trihydrogen_oxide" title="Trihydrogen oxide"><span class="chemf nowrap">H<sub class="template-chem2-sub">3</sub>O</span></a></li> <li><a href="/wiki/Dithionic_acid" title="Dithionic acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">6</sub></span></a></li> <li><a href="/wiki/Disulfuric_acid" title="Disulfuric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">7</sub></span></a></li> <li><a href="/wiki/Peroxydisulfuric_acid" title="Peroxydisulfuric acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>S<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">8</sub></span></a></li> <li><a href="/wiki/Triflic_acid" title="Triflic acid"><span class="chemf nowrap">CF<sub class="template-chem2-sub">3</sub>SO<sub class="template-chem2-sub">3</sub>H</span></a></li> <li><a href="/wiki/Hydrogen_telluride" title="Hydrogen telluride"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>Te</span></a></li> <li><a href="/wiki/Tellurous_acid" title="Tellurous acid"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>TeO<sub class="template-chem2-sub">3</sub></span></a></li> <li><a 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