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href="#Photometry_and_actinometry"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Photometry and actinometry</span> </div> </a> <ul id="toc-Photometry_and_actinometry-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Chemistry_education" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Chemistry_education"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Chemistry education</span> </div> </a> <ul id="toc-Chemistry_education-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Blueprints" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Blueprints"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Blueprints</span> </div> </a> <ul id="toc-Blueprints-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a 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Available in 16 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-16" 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">16 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%81%D8%B1%D9%8A_%D8%A3%D9%83%D8%B3%D8%A7%D9%84%D8%A7%D8%AA_%D8%A7%D9%84%D8%A8%D9%88%D8%AA%D8%A7%D8%B3%D9%8A%D9%88%D9%85" title="فري أكسالات البوتاسيوم – Arabic" lang="ar" hreflang="ar" data-title="فري أكسالات البوتاسيوم" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%BE%D9%88%D8%AA%D8%A7%D8%B3%DB%8C%D9%88%D9%85_%D9%81%D8%B1%DB%8C%D8%A7%D9%88%DA%A9%D8%B3%D8%A7%D9%84%D8%A7%D8%AA" title="پوتاسیوم فریاوکسالات – South Azerbaijani" lang="azb" hreflang="azb" data-title="پوتاسیوم فریاوکسالات" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Trisoxalato%C5%BEelezitan_draseln%C3%BD" title="Trisoxalatoželezitan draselný – Czech" lang="cs" hreflang="cs" data-title="Trisoxalatoželezitan draselný" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Kaliumtrioxalatoferrat(III)" title="Kaliumtrioxalatoferrat(III) – German" lang="de" hreflang="de" data-title="Kaliumtrioxalatoferrat(III)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Kalia_fera_(III)_oksalato" title="Kalia fera (III) oksalato – Esperanto" lang="eo" hreflang="eo" data-title="Kalia fera (III) oksalato" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%BE%D8%AA%D8%A7%D8%B3%DB%8C%D9%85_%D9%81%D8%B1%DB%8C%E2%80%8C%D8%A7%DA%A9%D8%B3%D8%A7%D9%84%D8%A7%D8%AA" title="پتاسیم فری‌اکسالات – Persian" lang="fa" hreflang="fa" data-title="پتاسیم فری‌اکسالات" 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/Ferrioxalate_de_potassium" title="Ferrioxalate de potassium – French" lang="fr" hreflang="fr" data-title="Ferrioxalate de potassium" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kalium_ferioksalat" title="Kalium ferioksalat – Indonesian" lang="id" hreflang="id" data-title="Kalium ferioksalat" 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/Ferriossalato_di_potassio" title="Ferriossalato di potassio – Italian" lang="it" hreflang="it" data-title="Ferriossalato di potassio" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Kaliumferrioxalaat" title="Kaliumferrioxalaat – Dutch" lang="nl" hreflang="nl" data-title="Kaliumferrioxalaat" 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%82%B7%E3%83%A5%E3%82%A6%E9%85%B8%E7%AC%AC%E4%BA%8C%E9%89%84%E3%82%AB%E3%83%AA%E3%82%A6%E3%83%A0" title="シュウ酸第二鉄カリウム – Japanese" lang="ja" hreflang="ja" data-title="シュウ酸第二鉄カリウム" 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-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Trioxalatoferrato(III)_de_pot%C3%A1ssio" title="Trioxalatoferrato(III) de potássio – Portuguese" lang="pt" hreflang="pt" data-title="Trioxalatoferrato(III) de potássio" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D0%BE%D0%BA%D1%81%D0%B0%D0%BB%D0%B0%D1%82%D0%BE%D1%84%D0%B5%D1%80%D1%80%D0%B0%D1%82(III)_%D0%BA%D0%B0%D0%BB%D0%B8%D1%8F" title="Триоксалатоферрат(III) калия – Russian" lang="ru" hreflang="ru" data-title="Триоксалатоферрат(III) калия" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kaliumferrioksalaatti" title="Kaliumferrioksalaatti – Finnish" lang="fi" hreflang="fi" data-title="Kaliumferrioksalaatti" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AA%E0%AF%8A%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AE%BE%E0%AE%9A%E0%AE%BF%E0%AE%AF%E0%AE%AE%E0%AF%8D_%E0%AE%AA%E0%AF%86%E0%AE%B0%E0%AF%8D%E0%AE%B0%E0%AE%BF%E0%AE%AF%E0%AE%BE%E0%AE%95%E0%AF%8D%E0%AE%9A%E0%AE%B2%E0%AF%87%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%81" title="பொட்டாசியம் பெர்ரியாக்சலேட்டு – Tamil" lang="ta" hreflang="ta" data-title="பொட்டாசியம் பெர்ரியாக்சலேட்டு" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%8D%89%E9%85%B8%E9%93%81%E9%92%BE" title="草酸铁钾 – Chinese" lang="zh" hreflang="zh" data-title="草酸铁钾" data-language-autonym="中文" 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class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Chemical compound</div> <style data-mw-deduplicate="TemplateStyles:r1084375498">.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%}</style> <table class="infobox ib-chembox"> <caption>Potassium ferrioxalate </caption> <tbody><tr> <td colspan="2" style="text-align:center; padding:2px;"><span typeof="mw:File"><a href="/wiki/File:Potassium_trioxalatoferrate(III)_large_crystals.jpg" class="mw-file-description" title="Lime green crystals of potassium ferrioxalate trihydrate"><img alt="Lime green crystals of potassium ferrioxalate trihydrate" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Potassium_trioxalatoferrate%28III%29_large_crystals.jpg/220px-Potassium_trioxalatoferrate%28III%29_large_crystals.jpg" decoding="async" width="220" height="189" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Potassium_trioxalatoferrate%28III%29_large_crystals.jpg/330px-Potassium_trioxalatoferrate%28III%29_large_crystals.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Potassium_trioxalatoferrate%28III%29_large_crystals.jpg/440px-Potassium_trioxalatoferrate%28III%29_large_crystals.jpg 2x" data-file-width="2448" data-file-height="2100" /></a></span> </td></tr> <tr> <td colspan="2" style="text-align:center; padding:2px;"><span typeof="mw:File"><a href="/wiki/File:Potassium-trioxalatoferrate(III)-2D.png" class="mw-file-description" title="Potassium ferrioxalate"><img alt="Potassium ferrioxalate" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/Potassium-trioxalatoferrate%28III%29-2D.png/220px-Potassium-trioxalatoferrate%28III%29-2D.png" decoding="async" width="220" height="169" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/Potassium-trioxalatoferrate%28III%29-2D.png/330px-Potassium-trioxalatoferrate%28III%29-2D.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/35/Potassium-trioxalatoferrate%28III%29-2D.png/440px-Potassium-trioxalatoferrate%28III%29-2D.png 2x" data-file-width="1100" data-file-height="847" /></a></span> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; 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;">Potassium iron(III) oxalate</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;">potassium ferrioxalate<br />potassium trisoxalatoferrate(III)</div> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; 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=14883-34-2">14883-34-2</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><li><span title="commonchemistry.cas.org"><a rel="nofollow" class="external text" href="https://commonchemistry.cas.org/detail?cas_rn=5936-11-8">5936-11-8</a></span> (trihydrate)<sup> <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></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=O%3DC%28C%28%3DO%29%5BO-%5D1%29%5BO-%5D%5BFe%2B3%5D123%28%5BO-%5DC%28C%28%3DO%29%5BO-%5D2%29%3DO%29%5BO-%5DC%28C%28%3DO%29%5BO-%5D3%29%3DO.%5BK%2B%5D.%5BK%2B%5D.%5BK%2B%5D">Interactive image</a></span></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.8108406.html">8108406</a></span></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/100.035.398">100.035.398</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q2479795#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>238-954-7</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/24180941">24180941</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>SZ3500000</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/BV5XLR9R4O">BV5XLR9R4O</a></span></li></ul></div> </td></tr> <tr> <td><a href="/wiki/UN_number" title="UN number">UN number</a> </td> <td>3077 </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/DTXSID201045914">DTXSID201045914</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q2479795#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; background:transparent;"><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/3C2H2O4.Fe.K/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;+3;+1/p-2</div><div style="word-wrap:break-word; text-indent:-1.5em; font-size:97%; line-height:120%;">Key: VSRUWRBJHJVUDC-UHFFFAOYSA-L</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; background:transparent;"><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%;">O=C(C(=O)[O-]1)[O-][Fe+3]123([O-]C(C(=O)[O-]2)=O)[O-]C(C(=O)[O-]3)=O.[K+].[K+].[K+]</div></li></ul> </div> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; 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">K<sub class="template-chem2-sub">3</sub>[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>]</span> (anhydrous)<br /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">K<sub class="template-chem2-sub">3</sub>[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>]·3H<sub>2</sub>O</span> (trihydrate)  </td></tr> <tr> <td><a href="/wiki/Molar_mass" title="Molar mass">Molar mass</a> </td> <td>437.20 g/mol (anhydrous)<br />491.25 g/mol (trihydrate)    </td></tr> <tr> <td>Appearance </td> <td>emerald green crystals </td></tr> <tr> <td><a href="/wiki/Density" title="Density">Density</a> </td> <td>2.13 g/cm<sup>3</sup> </td></tr> <tr> <td><a href="/wiki/Melting_point" title="Melting point">Melting point</a> </td> <td>230 °C (446 °F; 503 K) the trihydrate loses 3<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">H<sub class="template-chem2-sub">2</sub>O</span> at 113 °C<sup id="cite_ref-ladr_1-0" class="reference"><a href="#cite_note-ladr-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Structure </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Coordination_geometry" title="Coordination geometry">Coordination geometry</a></div> </td> <td><a href="/wiki/Octahedral" class="mw-redirect" title="Octahedral">octahedral</a> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Dipole#Molecular_dipoles" title="Dipole">Dipole moment</a></div> </td> <td>0 <a href="/wiki/Debye" title="Debye">D</a> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Hazards<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </th></tr> <tr> <td colspan="2" style="text-align:left; background-color:#eaeaea;"><b><a href="/wiki/Occupational_safety_and_health" title="Occupational safety and health">Occupational safety and health</a></b> (OHS/OSH): </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Main hazards</div> </td> <td>Corrosive. Eye, respiratory and skin irritant. </td></tr> <tr> <td colspan="2" style="text-align:left; background-color:#eaeaea;"><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-exclam.svg" class="mw-file-description" title="GHS07: Exclamation mark"><img alt="GHS07: Exclamation mark" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c3/GHS-pictogram-exclam.svg/50px-GHS-pictogram-exclam.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c3/GHS-pictogram-exclam.svg/75px-GHS-pictogram-exclam.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c3/GHS-pictogram-exclam.svg/100px-GHS-pictogram-exclam.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals#Signal_word" title="Globally Harmonized System of Classification and Labelling of Chemicals">Signal word</a></div> </td> <td><b>Warning</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="H302: Harmful if swallowed">H302</abbr>, <abbr class="abbr" title="H312: Harmful in contact with skin">H312</abbr> </td></tr> <tr> <td style="padding-left:1em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/GHS_precautionary_statements" title="GHS precautionary statements">Precautionary statements</a></div> </td> <td><abbr class="abbr" title="P280: Wear protective gloves/protective clothing/eye protection/face protection.">P280</abbr>, <abbr class="abbr" title="P301+P330+P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.">P301+P330+P331</abbr>, <abbr class="abbr" title="P302+P353: IF ON SKIN: Rinse skin with water [or shower].">P302+P353</abbr>, <abbr class="abbr" title="P312: Call a POISON CENTER or doctor/physician if you feel unwell.">P312</abbr>, <abbr class="abbr" title="P330: Rinse mouth.">P330</abbr>, <abbr class="abbr" title="P363: Wash contaminated clothing before reuse.">P363</abbr>, <abbr class="abbr" title="P403: Store in a well ventilated place.">P403</abbr>, <abbr class="abbr" title="P501: Dispose of contents/container to ...">P501</abbr> </td></tr> <tr> <th colspan="2" style="background: #f8eaba; text-align: center;">Related compounds </th></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Other <a href="/wiki/Ion" title="Ion">anions</a></div> </td> <td><a href="/wiki/Sodium_ferrioxalate" title="Sodium ferrioxalate">Sodium ferrioxalate</a> </td></tr> <tr> <td><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Related compounds</div> </td> <td><a href="/wiki/Iron(II)_oxalate" title="Iron(II) oxalate">Iron(II) oxalate</a><br /><a href="/wiki/Iron(III)_oxalate" class="mw-redirect" title="Iron(III) oxalate">Iron(III) oxalate</a> </td></tr> <tr> <td colspan="2" style="text-align:left; background:#f8eaba; 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=451553204&page2=Potassium+ferrioxalate">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>Potassium ferrioxalate,</b> also called <b>potassium trisoxalatoferrate</b> or <b>potassium tris(oxalato)ferrate(III)</b><sup id="cite_ref-sari_3-0" class="reference"><a href="#cite_note-sari-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> is a chemical compound with the formula <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap"><a href="/wiki/Potassium" title="Potassium">K</a><sub class="template-chem2-sub">3</sub>[<a href="/wiki/Iron" title="Iron">Fe</a>(<a href="/wiki/Carbon" title="Carbon">C</a><sub class="template-chem2-sub">2</sub><a href="/wiki/Oxygen" title="Oxygen">O</a><sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>]</span>. It often occurs as the <a href="/wiki/Trihydrate" class="mw-redirect" title="Trihydrate">trihydrate</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">K<sub class="template-chem2-sub">3</sub>[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>]·3H<sub>2</sub>O</span>. Both are crystalline compounds, lime green in colour.<sup id="cite_ref-JCB_4-0" class="reference"><a href="#cite_note-JCB-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>The compound is a <a href="/wiki/Salt_(chemistry)" title="Salt (chemistry)">salt</a> consisting of <a href="/wiki/Ferrioxalate" title="Ferrioxalate">ferrioxalate</a> <a href="/wiki/Anion" class="mw-redirect" title="Anion">anions</a>, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>]<sup>3−</sup></span>, and <a href="/wiki/Potassium" title="Potassium">potassium</a> cations <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">K<sup>+</sup></span>. The anion is a <a href="/wiki/Transition_metal_oxalate_complex" title="Transition metal oxalate complex">transition metal oxalate complex</a> consisting of an <a href="/wiki/Iron" title="Iron">iron</a> atom in the +3 oxidation state and three <a href="/wiki/Bidentate" class="mw-redirect" title="Bidentate">bidentate</a> <a href="/wiki/Oxalate" title="Oxalate">oxalate</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">C<sub class="template-chem2-sub">2</sub>O<span class="template-chem2-su"><span>2−</span><span>4</span></span></span> <a href="/wiki/Ligands" class="mw-redirect" title="Ligands">ligands</a>. Potassium is a <a href="/wiki/Counterion" title="Counterion">counterion</a>, balancing the −3 charge of the complex. In solution, the salt dissociates to give the ferrioxalate anion, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>]<sup>3−</sup></span>, which appears fluorescent green in color. The salt is available in anhydrous form<sup id="cite_ref-sari_3-1" class="reference"><a href="#cite_note-sari-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> as well as a <a href="/wiki/Water_of_crystallization" title="Water of crystallization">trihydrate</a>.<sup id="cite_ref-Junk_5-0" class="reference"><a href="#cite_note-Junk-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The ferrioxalate anion is quite stable in the dark, but it is decomposed by light and high-energy <a href="/wiki/Electromagnetic_radiation" title="Electromagnetic radiation">electromagnetic radiation</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Preparation">Preparation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=1" title="Edit section: Preparation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The complex can be synthesized by the reaction between <a href="/wiki/Iron(III)_sulfate" title="Iron(III) sulfate">iron(III) sulfate</a>, <a href="/wiki/Barium_oxalate" title="Barium oxalate">barium oxalate</a> and <a href="/wiki/Potassium_oxalate" class="mw-redirect" title="Potassium oxalate">potassium oxalate</a>:<sup id="cite_ref-JCB_4-1" class="reference"><a href="#cite_note-JCB-4"><span class="cite-bracket">[</span>4<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">Fe<sub class="template-chem2-sub">2</sub>(SO<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub> + 3 BaC<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub> + 3 K<sub class="template-chem2-sub">2</sub>C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub> → 2 K<sub class="template-chem2-sub">3</sub>[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>] + 3 BaSO<sub class="template-chem2-sub">4</sub></span></dd></dl> <p>As can be read in the reference above, iron(III) sulfate, barium oxalate and potassium oxalate are combined in water and digested for several hours on a steam bath. Oxalate ions from barium oxalate will then replace the sulfate ions in solution, removing them as <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">BaSO<sub class="template-chem2-sub">4</sub></span> which can then be filtered and the pure material can be crystallized. </p> <div class="mw-heading mw-heading2"><h2 id="Structure">Structure</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=2" title="Edit section: Structure"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The structures of the trihydrate and of the anhydrous salt have been extensively studied.<sup id="cite_ref-Junk_5-1" class="reference"><a href="#cite_note-Junk-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> which indicates that the Fe(III) is <a href="/wiki/High_spin" class="mw-redirect" title="High spin">high spin</a>; as the low spin complex would display <a href="/wiki/Jahn%E2%80%93Teller_distortion" class="mw-redirect" title="Jahn–Teller distortion">Jahn–Teller distortions</a>. The ammonium and mixed sodium-potassium salts are <a href="/wiki/Isomorphous" class="mw-redirect" title="Isomorphous">isomorphous</a>, as are related complexes with <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">Al<sup>3+</sup>, Cr<sup>3+</sup>, and V<sup>3+</sup></span>. </p><p>The ferrioxalate complex displays <a href="/wiki/Helical_chirality" class="mw-redirect" title="Helical chirality">helical chirality</a> as it can form two non-superimposable geometries. In accordance with the IUPAC convention, the isomer with the left-handed screw axis is assigned the Greek symbol <i>Λ</i> (lambda). Its mirror image with the right-handed screw axis is given the Greek symbol <i>Δ</i> (delta).<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-halign-center" typeof="mw:File/Frameless"><a href="/wiki/File:2-isomers-of-ferrioxalate.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/06/2-isomers-of-ferrioxalate.svg/300px-2-isomers-of-ferrioxalate.svg.png" decoding="async" width="300" height="174" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/06/2-isomers-of-ferrioxalate.svg/450px-2-isomers-of-ferrioxalate.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/06/2-isomers-of-ferrioxalate.svg/600px-2-isomers-of-ferrioxalate.svg.png 2x" data-file-width="391" data-file-height="227" /></a><figcaption></figcaption></figure> <div class="mw-heading mw-heading2"><h2 id="Reactions">Reactions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=3" title="Edit section: Reactions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Photoreduction">Photoreduction</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=4" title="Edit section: Photoreduction"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The ferrioxalate anion is sensitive to light and to high-energy electromagnetic radiation, including <a href="/wiki/X-rays" class="mw-redirect" title="X-rays">X-rays</a> and <a href="/wiki/Gamma_rays" class="mw-redirect" title="Gamma rays">gamma rays</a>. Absorption of a photon causes the decomposition of one oxalate ion to <a href="/wiki/Carbon_dioxide" title="Carbon dioxide">carbon dioxide</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1123817410"><span class="chemf nowrap">CO<sub class="template-chem2-sub">2</sub></span> and reduction of the iron(III) atom to iron(II).<sup id="cite_ref-hatch_7-0" class="reference"><a href="#cite_note-hatch-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> This photo-sensitive property is used for chemical <a href="/wiki/Actinometry" class="mw-redirect" title="Actinometry">actinometry</a>, the measure of luminous flux, and for preparation of <a href="/wiki/Blueprint" title="Blueprint">blueprints</a>. This light-catalyzed redox reaction once formed the basis of some photographic processes. However due to their insensitivity and ready availability of advanced digital photography, these processes are obsolete. </p> <div class="mw-heading mw-heading3"><h3 id="Thermal_decomposition">Thermal decomposition</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=5" title="Edit section: Thermal decomposition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The trihydrate loses the three water molecules at 113 °C.<sup id="cite_ref-ladr_1-1" class="reference"><a href="#cite_note-ladr-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>At 296 °C, the anhydrous salt decomposes into the iron(II) complex potassium ferrioxalate, potassium oxalate, and <a href="/wiki/Carbon_dioxide" title="Carbon dioxide">carbon dioxide</a>:<sup id="cite_ref-ladr_1-2" class="reference"><a href="#cite_note-ladr-1"><span class="cite-bracket">[</span>1<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">2 K<sub class="template-chem2-sub">3</sub>[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">3</sub>] → 2 K<sub class="template-chem2-sub">2</sub>[Fe(C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub>)<sub class="template-chem2-sub">2</sub>] + K<sub class="template-chem2-sub">2</sub>C<sub class="template-chem2-sub">2</sub>O<sub class="template-chem2-sub">4</sub> + 2 CO<sub class="template-chem2-sub">2</sub></span></dd></dl> <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=Potassium_ferrioxalate&action=edit&section=6" title="Edit section: Uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Photometry_and_actinometry">Photometry and actinometry</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=7" title="Edit section: Photometry and actinometry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The discovery of the efficient <a href="/wiki/Photolysis" class="mw-redirect" title="Photolysis">photolysis</a> of the ferrioxalate anion was a landmark for chemical <a href="/wiki/Photochemistry" title="Photochemistry">photochemistry</a> and <a href="/wiki/Actinometry" class="mw-redirect" title="Actinometry">actinometry</a>. The potassium salt was found to be over 1000 times more sensitive than <a href="/wiki/Uranyl_oxalate" title="Uranyl oxalate">uranyl oxalate</a>, the compound previously used for these purposes.<sup id="cite_ref-hatch_7-1" class="reference"><a href="#cite_note-hatch-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Chemistry_education">Chemistry education</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=8" title="Edit section: Chemistry education"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The synthesis and thermal decomposition of potassium ferrioxalate is a popular exercise for high school, college or undergraduate university students, since it involves the chemistry of transition metal complexes, visually observable photochemistry, and <a href="/wiki/Thermogravimetry" class="mw-redirect" title="Thermogravimetry">thermogravimetry</a>.<sup id="cite_ref-olmsted_9-0" class="reference"><a href="#cite_note-olmsted-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Blueprints">Blueprints</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Potassium_ferrioxalate&action=edit&section=9" title="Edit section: Blueprints"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Before the ready availability of wide <a href="/wiki/Ink-jet_printer" class="mw-redirect" title="Ink-jet printer">ink-jet</a> and <a href="/wiki/Laser_printer" class="mw-redirect" title="Laser printer">laser printers</a>, large-size engineering drawings were commonly reproduced by the <a href="/wiki/Cyanotype" title="Cyanotype">cyanotype</a> method. </p><p>That was a simple contact-based photographic process that produced a "negative" white-on-blue copy of the original drawing—a <a href="/wiki/Blueprint" title="Blueprint">blueprint</a>. The process is based on the photolysis of an iron(III) complex which gets converted into an insoluble iron(II) version in areas of the paper that were exposed to light. </p><p>The complex used in cyanotype is mainly <a href="/wiki/Ammonium_ferric_citrate" title="Ammonium ferric citrate">ammonium ferric citrate</a>, but potassium ferrioxalate is also used.<sup id="cite_ref-fiorito_10-0" class="reference"><a href="#cite_note-fiorito-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ware_11-0" class="reference"><a href="#cite_note-ware-11"><span class="cite-bracket">[</span>11<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=Potassium_ferrioxalate&action=edit&section=10" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A number of other iron oxalates are known: </p> <ul><li><a href="/wiki/Iron(II)_oxalate" title="Iron(II) oxalate">Iron(II) oxalate</a></li> <li><a href="/wiki/Iron(III)_oxalate" class="mw-redirect" title="Iron(III) oxalate">Iron(III) oxalate</a></li> <li><a href="/wiki/Sodium_ferrioxalate" title="Sodium ferrioxalate">Sodium ferrioxalate</a></li></ul> <p>See <a href="/wiki/Transition_metal_oxalate_complex" title="Transition metal oxalate complex">transition metal oxalate complex</a>. </p> <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=Potassium_ferrioxalate&action=edit&section=11" 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"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-ladr-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-ladr_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ladr_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-ladr_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text">J. Ladriere (1992): "Mössbauer Study on the Thermal Decomposition of Potassium Tris(oxalato)ferrate(III) Trihydrate and Bis(oxalato) ferrate(II) Dihydrate". <i>Hyperfine Interactions</i>, volume 70, issue 1, pages 1095–1098. <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><a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1007%2FBF02397520">10.1007/BF02397520</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</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.alfa.com/en/catalog/031124/">"5936-11-8 - Potassium trioxalatoferrate(III) trihydrate - Potassium iron(III) oxalate - 31124 - Alfa Aesar"</a>. <i>www.alfa.com</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.alfa.com&rft.atitle=5936-11-8+-+Potassium+trioxalatoferrate%28III%29+trihydrate+-+Potassium+iron%28III%29+oxalate+-+31124+-+Alfa+Aesar&rft_id=https%3A%2F%2Fwww.alfa.com%2Fen%2Fcatalog%2F031124%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3APotassium+ferrioxalate" class="Z3988"></span></span> </li> <li id="cite_note-sari-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-sari_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-sari_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">A. 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Potassium ferrioxalate as a standard chemical actinometer". <i>Proceedings of the Royal Society of London</i>. <b>235</b> (1203): 518–36. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1956RSPSA.235..518H">1956RSPSA.235..518H</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1098%2Frspa.1956.0102">10.1098/rspa.1956.0102</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:98652159">98652159</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Proceedings+of+the+Royal+Society+of+London&rft.atitle=A+new+sensitive+chemical+actinometer.+II.+Potassium+ferrioxalate+as+a+standard+chemical+actinometer&rft.volume=235&rft.issue=1203&rft.pages=518-36&rft.date=1956&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A98652159%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1098%2Frspa.1956.0102&rft_id=info%3Abibcode%2F1956RSPSA.235..518H&rft.au=Hatchard%2C+C.+G.&rft.au=Parker%2C+C.+A.&rfr_id=info%3Asid%2Fen.wikipedia.org%3APotassium+ferrioxalate" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPozdnyakovKelPlyusninGrivin2008" class="citation journal cs1">Pozdnyakov, Ivan P.; Kel, Oksana V.; Plyusnin, Victor F.; Grivin, Vyacheslav P.; Bazhin, Nikolai M. (2008). "New Insight into Photochemistry of Ferrioxalate". <i>J. Phys. Chem. A</i>. <b>112</b> (36): 8316–8322. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2008JPCA..112.8316P">2008JPCA..112.8316P</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fjp8040583">10.1021/jp8040583</a>. <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/18707071">18707071</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=J.+Phys.+Chem.+A&rft.atitle=New+Insight+into+Photochemistry+of+Ferrioxalate&rft.volume=112&rft.issue=36&rft.pages=8316-8322&rft.date=2008&rft_id=info%3Apmid%2F18707071&rft_id=info%3Adoi%2F10.1021%2Fjp8040583&rft_id=info%3Abibcode%2F2008JPCA..112.8316P&rft.aulast=Pozdnyakov&rft.aufirst=Ivan+P.&rft.au=Kel%2C+Oksana+V.&rft.au=Plyusnin%2C+Victor+F.&rft.au=Grivin%2C+Vyacheslav+P.&rft.au=Bazhin%2C+Nikolai+M.&rfr_id=info%3Asid%2Fen.wikipedia.org%3APotassium+ferrioxalate" class="Z3988"></span></span> </li> <li id="cite_note-olmsted-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-olmsted_9-0">^</a></b></span> <span class="reference-text">John Olmsted (1984): "Preparation and analysis of potassium tris(oxalato)ferrate(III)trihydrate: A general chemistry experiment". <i>Journal of Chemical Education</i>, volume 61, issue 12, page 1098. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><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%2Fed061p1098">10.1021/ed061p1098</a></span> </li> <li id="cite_note-fiorito-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-fiorito_10-0">^</a></b></span> <span class="reference-text">Pablo Alejandro Fiorito and André Sarto Polo (2015): "A New Approach toward Cyanotype Photography Using Tris-(oxalato)ferrate(III): An Integrated Experiment". <i>Journal of Chemical Education</i>, volume 92, issue 10, pages 1721–1724. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><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%2Fed500809n">10.1021/ed500809n</a></span> </li> <li id="cite_note-ware-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-ware_11-0">^</a></b></span> <span class="reference-text">Mike Ware (2014): <i><a rel="nofollow" class="external text" href="https://www.academia.edu/10303227/Cyanomicon_The_History_Science_and_Art_of_Cyanotype_photographic_printing_in_Prussian_blue">Cyanomicon - History, Science and Art of Cyanotype: photographic printing in Prussian blue</a></i>. Online document at www.academia.edu, published by www.mikeware.co.uk, accessed on 2019-03-29.</span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist 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this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Potassium_compounds" title="Special:EditPage/Template:Potassium compounds"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Potassium_compounds" style="font-size:114%;margin:0 4em"><a href="/wiki/Potassium_compounds" class="mw-redirect" title="Potassium compounds">Potassium compounds</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">H, (pseudo)halogens</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Potassium_fluoride" title="Potassium fluoride">KF</a></li> <li><a href="/wiki/Potassium_bifluoride" title="Potassium bifluoride">KHF<sub>2</sub></a></li> <li><a href="/wiki/Potassium_hydride" title="Potassium hydride">KH</a></li> <li><a href="/wiki/Potassium_chloride" title="Potassium chloride">KCl</a></li> <li><a href="/wiki/Potassium_hypochlorite" title="Potassium hypochlorite">KClO</a></li> <li><a href="/wiki/Potassium_chlorate" title="Potassium chlorate">KClO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_perchlorate" title="Potassium perchlorate">KClO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_bromide" title="Potassium bromide">KBr</a></li> <li><a href="/wiki/Potassium_bromate" title="Potassium bromate">KBrO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_iodide" title="Potassium iodide">KI</a></li> <li><a href="/wiki/Potassium_iodate" title="Potassium iodate">KIO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_periodate" title="Potassium periodate">KIO<sub>4</sub></a></li> <li><a href="/w/index.php?title=Potassium_astatide&action=edit&redlink=1" class="new" title="Potassium astatide (page does not exist)">KAt</a></li> <li><a href="/wiki/Potassium_cyanide" title="Potassium cyanide">KCN</a></li> <li><a href="/wiki/Potassium_fulminate" title="Potassium fulminate">KCNO</a></li> <li><a href="/wiki/Potassium_cyanate" title="Potassium cyanate">KOCN</a></li> <li><a href="/wiki/Potassium_thiocyanate" title="Potassium thiocyanate">KSCN</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">chalcogens</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Potassium_oxide" title="Potassium oxide">K<sub>2</sub>O</a></li> <li><a href="/wiki/Potassium_hydroxide" title="Potassium hydroxide">KOH</a></li> <li><a href="/wiki/Potassium_peroxide" title="Potassium peroxide">K<sub>2</sub>O<sub>2</sub></a></li> <li><a href="/wiki/Potassium_superoxide" title="Potassium superoxide">KO<sub>2</sub></a></li> <li><a href="/wiki/Potassium_ozonide" title="Potassium ozonide">KO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_sulfide" title="Potassium sulfide">K<sub>2</sub>S</a></li> <li><a href="/wiki/Potassium_hydrosulfide" title="Potassium hydrosulfide">KHS</a></li> <li><a href="/wiki/Potassium_sulfite" title="Potassium sulfite">K<sub>2</sub>SO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_bisulfite" title="Potassium bisulfite">KHSO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_sulfate" title="Potassium sulfate">K<sub>2</sub>SO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_bisulfate" title="Potassium bisulfate">KHSO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_peroxymonosulfate" title="Potassium peroxymonosulfate">KHSO<sub>5</sub></a></li> <li><a href="/wiki/Potassium_thiosulfate" title="Potassium thiosulfate">K<sub>2</sub>S<sub>2</sub>O<sub>3</sub></a></li> <li><a href="/wiki/Potassium_metabisulfite" title="Potassium metabisulfite">K<sub>2</sub>S<sub>2</sub>O<sub>5</sub></a></li> <li><a href="/wiki/Potassium_pyrosulfate" title="Potassium pyrosulfate">K<sub>2</sub>S<sub>2</sub>O<sub>7</sub></a></li> <li><a href="/wiki/Potassium_persulfate" title="Potassium persulfate">K<sub>2</sub>S<sub>2</sub>O<sub>8</sub></a></li> <li><a href="/wiki/Potassium_selenide" title="Potassium selenide">K<sub>2</sub>Se</a></li> <li><a href="/w/index.php?title=Potassium_selenite&action=edit&redlink=1" class="new" title="Potassium selenite (page does not exist)">K<sub>2</sub>SeO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_selenate" title="Potassium selenate">K<sub>2</sub>SeO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_telluride" title="Potassium telluride">K<sub>2</sub>Te</a></li> <li><a href="/wiki/Potassium_tellurite" title="Potassium tellurite">K<sub>2</sub>TeO<sub>3</sub></a></li> <li><a href="/w/index.php?title=Potassium_tellurate&action=edit&redlink=1" class="new" title="Potassium tellurate (page does not exist)">K<sub>2</sub>TeO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_polonide" title="Potassium polonide">K<sub>2</sub>Po</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">pnictogens</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Potassium_nitride" title="Potassium nitride">K<sub>3</sub>N</a></li> <li><a href="/wiki/Potassium_amide" title="Potassium amide">KNH<sub>2</sub></a></li> <li><a href="/wiki/Potassium_azide" title="Potassium azide">KN<sub>3</sub></a></li> <li><a href="/wiki/Potassium_nitrite" title="Potassium nitrite">KNO<sub>2</sub></a></li> <li><a href="/wiki/Potassium_nitrate" title="Potassium nitrate">KNO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_phosphide" title="Potassium phosphide">K<sub>3</sub>P</a></li> <li><a href="/wiki/Monopotassium_phosphite" title="Monopotassium phosphite">KH<sub>2</sub>PO<sub>3</sub></a></li> <li><a href="/wiki/Tripotassium_phosphate" title="Tripotassium phosphate">K<sub>3</sub>PO<sub>4</sub></a></li> <li><a href="/wiki/Dipotassium_phosphate" title="Dipotassium phosphate">K<sub>2</sub>HPO<sub>4</sub></a></li> <li><a href="/wiki/Monopotassium_phosphate" title="Monopotassium phosphate">KH<sub>2</sub>PO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_hexafluorophosphate" title="Potassium hexafluorophosphate">KPF<sub>6</sub></a></li> <li><a href="/wiki/Potassium_arsenite" title="Potassium arsenite">KAsO<sub>2</sub></a></li> <li><a href="/w/index.php?title=Tripotassium_arsenate&action=edit&redlink=1" class="new" title="Tripotassium arsenate (page does not exist)">K<sub>3</sub>AsO<sub>4</sub></a></li> <li><a href="/w/index.php?title=Dipotassium_arsenate&action=edit&redlink=1" class="new" title="Dipotassium arsenate (page does not exist)">K<sub>2</sub>HAsO<sub>4</sub></a></li> <li><a href="/wiki/Monopotassium_arsenate" title="Monopotassium arsenate">KH<sub>2</sub>AsO<sub>4</sub></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">B, C group</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Potassium_tetraborate&action=edit&redlink=1" class="new" title="Potassium tetraborate (page does not exist)">B<sub>4</sub>K<sub>2</sub>O<sub>7</sub></a></li> <li><a href="/wiki/Potassium_carbonate" title="Potassium carbonate">K<sub>2</sub>CO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_bicarbonate" title="Potassium bicarbonate">KHCO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_silicate" title="Potassium silicate">K<sub>2</sub>SiO<sub>3</sub></a></li> <li><a href="/wiki/Potassium_fluorosilicate" title="Potassium fluorosilicate">K<sub>2</sub>SiF<sub>6</sub></a></li> <li><a href="/wiki/Potassium_aluminate" title="Potassium aluminate">K<sub>2</sub>Al<sub>2</sub>O<sub>4</sub></a></li> <li><a href="/wiki/Potassium_aluminium_borate" title="Potassium aluminium borate">K<sub>2</sub>Al<sub>2</sub>B<sub>2</sub>O<sub>7</sub></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">transition metals</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Potassium_tetrachloroplatinate" title="Potassium tetrachloroplatinate">K<sub>2</sub>PtCl<sub>4</sub></a></li> <li><a href="/wiki/Krogmann%27s_salt" title="Krogmann's salt">K<sub>2</sub>Pt(CN)<sub>4</sub></a></li> <li><a href="/wiki/Potassium_hexafluorotitanate" title="Potassium hexafluorotitanate"><span class="chemf nowrap">K<sub class="template-chem2-sub">2</sub>TiF<sub class="template-chem2-sub">6</sub></span></a></li> <li><a href="/wiki/Potassium_hexachloroplatinate" title="Potassium hexachloroplatinate">K<sub>2</sub>PtCl<sub>6</sub></a></li> <li><a href="/wiki/Potassium_hexachlororhenate" title="Potassium hexachlororhenate">K<sub>2</sub>ReCl<sub>6</sub></a></li> <li><a href="/wiki/Potassium_hexafluororhenate" title="Potassium hexafluororhenate"><span class="chemf nowrap">K<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline">2</sub></span></span>ReF<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline">6</sub></span></span></span></a></li> <li><a href="/wiki/Potassium_hexafluoroarsenate" title="Potassium hexafluoroarsenate"><span class="chemf nowrap">KAsF<sub class="template-chem2-sub">6</sub></span></a></li> <li><a href="/wiki/Potassium_hexabromorhenate" title="Potassium hexabromorhenate"><span class="chemf nowrap">K<sub class="template-chem2-sub">2</sub>ReBr<sub class="template-chem2-sub">6</sub></span></a></li> <li><a href="/wiki/Potassium_hexaiodorhenate" title="Potassium hexaiodorhenate"><span class="chemf nowrap">K<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline">2</sub></span></span>ReI<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline">6</sub></span></span></span></a></li> <li><a href="/wiki/Potassium_hexafluorozirconate" title="Potassium hexafluorozirconate"><span class="chemf nowrap">K<sub class="template-chem2-sub">2</sub>ZrF<sub class="template-chem2-sub">6</sub></span></a></li> <li><a href="/wiki/Potassium_ferrocyanide" title="Potassium ferrocyanide">K<sub>4</sub>Fe(CN)<sub>6</sub></a></li> <li><a href="/wiki/Potassium_ferricyanide" title="Potassium ferricyanide">K<sub>3</sub>Fe(CN)<sub>6</sub></a></li> <li><a class="mw-selflink selflink">K<sub>3</sub>Fe(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub></a></li> <li><a href="/wiki/Potassium_ferrate" title="Potassium ferrate">K<sub>2</sub>FeO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_manganate" title="Potassium manganate">K<sub>2</sub>MnO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_permanganate" title="Potassium permanganate">KMnO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_hypochromate" title="Potassium hypochromate">K<sub>3</sub>CrO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_chromate" title="Potassium chromate">K<sub>2</sub>CrO<sub>4</sub></a></li> <li><a href="/wiki/Potassium_peroxochromate" class="mw-redirect" title="Potassium peroxochromate">K<sub>3</sub>CrO<sub>8</sub></a></li> <li><a href="/wiki/Potassium_chlorochromate" title="Potassium chlorochromate">KCrO<sub>3</sub>Cl</a></li> <li><a href="/wiki/Potassium_dichromate" title="Potassium dichromate">K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub></a></li> <li><a href="/w/index.php?title=Potassium_trichromate&action=edit&redlink=1" class="new" title="Potassium trichromate (page does not exist)">K<sub>2</sub>Cr<sub>3</sub>O<sub>10</sub></a></li> <li><a href="/w/index.php?title=Potassium_tetrachromate&action=edit&redlink=1" class="new" title="Potassium tetrachromate (page does not exist)">K<sub>2</sub>Cr<sub>4</sub>O<sub>13</sub></a></li> <li><a href="/wiki/Potassium_octachlorodimolybdate" title="Potassium octachlorodimolybdate">K<sub>4</sub>Mo<sub>2</sub>Cl<sub>8</sub></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">organic</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Potassium_formate" title="Potassium formate">KHCO<sub>2</sub></a></li> <li><a href="/wiki/Potassium_acetate" title="Potassium acetate">KCH<sub>3</sub>CO<sub>2</sub></a></li> <li><a href="/wiki/Potassium_trifluoroacetate" title="Potassium trifluoroacetate">KCF<sub>3</sub>CO<sub>2</sub></a></li> <li><a href="/wiki/Potassium_oxalate" class="mw-redirect" title="Potassium oxalate">K<sub>2</sub>C<sub>2</sub>O<sub>4</sub></a></li> <li><a href="/wiki/Potassium_bioxalate" class="mw-redirect" title="Potassium bioxalate">KHC<sub>2</sub>O<sub>4</sub></a></li> <li><a href="/wiki/Potassium_laurate" title="Potassium laurate">KC<sub>12</sub>H<sub>23</sub>O<sub>2</sub></a></li> <li><a href="/wiki/Potassium_stearate" title="Potassium stearate">KC<sub>18</sub>H<sub>35</sub>O<sub>2</sub></a></li> <li><a href="/w/index.php?title=Potassium_malonate&action=edit&redlink=1" class="new" title="Potassium malonate (page does not exist)">C<sub>3</sub>H<sub>2</sub>K<sub>2</sub>O<sub>4</sub></a></li> <li><a href="/w/index.php?title=Methyl_potassium_malonate&action=edit&redlink=1" class="new" title="Methyl potassium malonate (page does not exist)">C<sub>4</sub>H<sub>6</sub>KO<sub>4</sub></a></li> <li><a href="/w/index.php?title=Ethyl_potassium_malonate&action=edit&redlink=1" class="new" title="Ethyl potassium malonate (page does not exist)">C<sub>5</sub>H<sub>7</sub>KO<sub>4</sub></a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Potassium_ferrioxalate&oldid=1252392945">https://en.wikipedia.org/w/index.php?title=Potassium_ferrioxalate&oldid=1252392945</a>"</div></div> <div id="catlinks" class="catlinks" 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