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Available in 11 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-11" 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">11 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Colorant_Sudan" title="Colorant Sudan – Catalan" lang="ca" hreflang="ca" data-title="Colorant Sudan" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Sudanfarbstoffe" title="Sudanfarbstoffe – German" lang="de" hreflang="de" data-title="Sudanfarbstoffe" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/T%C3%A9cnica_del_sud%C3%A1n_III" title="Técnica del sudán III – Spanish" lang="es" hreflang="es" data-title="Técnica del sudán III" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Sudan_(colorants)" title="Sudan (colorants) – French" lang="fr" hreflang="fr" data-title="Sudan (colorants)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/T%C3%A9cnica_do_Sud%C3%A1n_III" title="Técnica do Sudán III – Galician" lang="gl" hreflang="gl" data-title="Técnica do Sudán III" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Sudan_bojilo" title="Sudan bojilo – Croatian" lang="hr" hreflang="hr" data-title="Sudan bojilo" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Sudan_(barwnik)" title="Sudan (barwnik) – Polish" lang="pl" hreflang="pl" data-title="Sudan (barwnik)" 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/Corante_Sudan" title="Corante Sudan – Portuguese" lang="pt" hreflang="pt" data-title="Corante Sudan" 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%A1%D1%83%D0%B4%D0%B0%D0%BD_(%D0%BA%D1%80%D0%B0%D1%81%D0%B8%D1%82%D0%B5%D0%BB%D0%B8)" title="Судан (красители) – Russian" lang="ru" hreflang="ru" data-title="Судан (красители)" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Sudan_(f%C3%A4rg%C3%A4mne)" title="Sudan (färgämne) – Swedish" lang="sv" hreflang="sv" data-title="Sudan (färgämne)" data-language-autonym="Svenska" 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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">Group of dyes</div> <p><b>Sudan stains</b> and <b>Sudan dyes</b> are synthetic <a href="/wiki/Organic_compound" title="Organic compound">organic compounds</a> that are used as <a href="/wiki/Dye" title="Dye">dyes</a> for various <a href="/wiki/Plastics" class="mw-redirect" title="Plastics">plastics</a> (<a href="/wiki/Plastic_colorant" title="Plastic colorant">plastic colorants</a>) and are also used to stain <b>sudanophilic</b> biological samples, usually <a href="/wiki/Lipid" title="Lipid">lipids</a>. <a href="/wiki/Sudan_II" title="Sudan II">Sudan II</a>, <a href="/wiki/Sudan_III" title="Sudan III">Sudan III</a>, <a href="/wiki/Sudan_IV" title="Sudan IV">Sudan IV</a>, <a href="/wiki/Oil_Red_O" title="Oil Red O">Oil Red O</a>, and <a href="/wiki/Sudan_Black_B" class="mw-redirect" title="Sudan Black B">Sudan Black B</a> are important members of this class of compounds (see images below). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Staining">Staining</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Sudan_stain&action=edit&section=1" title="Edit section: Staining"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Sudan dyes have high affinity to fats, therefore they are used to demonstrate <a href="/wiki/Triglyceride" title="Triglyceride">triglycerides</a>, <a href="/wiki/Lipid" title="Lipid">lipids</a>, and <a href="/wiki/Lipoprotein" title="Lipoprotein">lipoproteins</a>. Alcoholic solutions of Sudan dyes are usually used, however <a href="/wiki/Pyridine" title="Pyridine">pyridine</a> solutions can be used in some situations as well. </p><p><b>Sudan stain test</b> is often used to determine the level of <a href="/wiki/Fecal_fat" class="mw-redirect" title="Fecal fat">fecal fat</a> to diagnose <a href="/wiki/Steatorrhea" title="Steatorrhea">steatorrhea</a>. A small sample is dissolved in water or saline, <a href="/wiki/Glacial_acetic_acid" class="mw-redirect" title="Glacial acetic acid">glacial acetic acid</a> is added to hydrolyze the insoluble salts of <a href="/wiki/Fatty_acid" title="Fatty acid">fatty acids</a>, a few drops of alcoholic solution of Sudan III are added, the sample is spread on a microscopic slide, and heated twice to boil. Normally a stool sample should show only a few drops of red-orange stained fat under the microscope. The method is only semiquantitative but, due to its simplicity, it is used for <a href="/wiki/Screening_(medicine)" title="Screening (medicine)">screening</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Dyeing">Dyeing</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Sudan_stain&action=edit&section=2" title="Edit section: Dyeing"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Since they are characteristically oil- and fat-soluble, Sudan dyes are also useful for dyeing plastics and fabrics.<sup id="cite_ref-Ullmann's_Encyclopedia_of_Industrial_Chemistry_1-0" class="reference"><a href="#cite_note-Ullmann's_Encyclopedia_of_Industrial_Chemistry-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Sudan dyes I–IV and Sudan Red G consist of <a href="/wiki/Diazonium_salt" class="mw-redirect" title="Diazonium salt">arylazo</a>-substituted <a href="/wiki/Naphthol" title="Naphthol">naphthols</a>. Such compounds are known to exist as a pair of <a href="/wiki/Tautomer" title="Tautomer">tautomers</a>: </p> <dl><dd><span typeof="mw:File"><a href="/wiki/File:HydrazoneAzoTautomerism.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/HydrazoneAzoTautomerism.png/220px-HydrazoneAzoTautomerism.png" decoding="async" width="220" height="162" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/HydrazoneAzoTautomerism.png/330px-HydrazoneAzoTautomerism.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/da/HydrazoneAzoTautomerism.png/440px-HydrazoneAzoTautomerism.png 2x" data-file-width="704" data-file-height="517" /></a></span></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Examples">Examples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Sudan_stain&action=edit&section=3" title="Edit section: Examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional" style="max-width: 669px;"> <li class="gallerycaption">Selected Sudan dyes</li> <li class="gallerybox" style="width: 215px"> <div class="thumb" style="width: 210px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sudan_I.svg" class="mw-file-description" title="Sudan I"><img alt="Sudan I" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Sudan_I.svg/170px-Sudan_I.svg.png" decoding="async" width="170" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Sudan_I.svg/256px-Sudan_I.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Sudan_I.svg/341px-Sudan_I.svg.png 2x" data-file-width="359" data-file-height="253" /></a></span></div> <div class="gallerytext"><a href="/wiki/Sudan_I" title="Sudan I">Sudan I</a></div> </li> <li class="gallerybox" style="width: 215px"> <div class="thumb" style="width: 210px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sudan_II.svg" class="mw-file-description" title="Sudan II"><img alt="Sudan II" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Sudan_II.svg/173px-Sudan_II.svg.png" decoding="async" width="173" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Sudan_II.svg/259px-Sudan_II.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/af/Sudan_II.svg/345px-Sudan_II.svg.png 2x" data-file-width="411" data-file-height="286" /></a></span></div> <div class="gallerytext"><a href="/wiki/Sudan_II" title="Sudan II">Sudan II</a></div> </li> <li class="gallerybox" style="width: 215px"> <div class="thumb" style="width: 210px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sudan_III.svg" class="mw-file-description" title="Sudan III"><img alt="Sudan III" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/Sudan_III.svg/180px-Sudan_III.svg.png" decoding="async" width="180" height="75" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/Sudan_III.svg/270px-Sudan_III.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/94/Sudan_III.svg/360px-Sudan_III.svg.png 2x" data-file-width="581" data-file-height="243" /></a></span></div> <div class="gallerytext"><a href="/wiki/Sudan_III" title="Sudan III">Sudan III</a></div> </li> <li class="gallerybox" style="width: 215px"> <div class="thumb" style="width: 210px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sudan_IV.svg" class="mw-file-description" title="Sudan IV"><img alt="Sudan IV" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Sudan_IV.svg/180px-Sudan_IV.svg.png" decoding="async" width="180" height="85" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Sudan_IV.svg/270px-Sudan_IV.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/18/Sudan_IV.svg/360px-Sudan_IV.svg.png 2x" data-file-width="613" data-file-height="290" /></a></span></div> <div class="gallerytext"><a href="/wiki/Sudan_IV" title="Sudan IV">Sudan IV</a></div> </li> <li class="gallerybox" style="width: 215px"> <div class="thumb" style="width: 210px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sudan_Black_B.svg" class="mw-file-description" title="Sudan Black B"><img alt="Sudan Black B" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Sudan_Black_B.svg/180px-Sudan_Black_B.svg.png" decoding="async" width="180" height="56" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Sudan_Black_B.svg/270px-Sudan_Black_B.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Sudan_Black_B.svg/360px-Sudan_Black_B.svg.png 2x" data-file-width="800" data-file-height="250" /></a></span></div> <div class="gallerytext"><a href="/wiki/Sudan_Black_B" class="mw-redirect" title="Sudan Black B">Sudan Black B</a></div> </li> <li class="gallerybox" style="width: 215px"> <div class="thumb" style="width: 210px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sudan_Red_G.png" class="mw-file-description" title="Sudan Red G"><img alt="Sudan Red G" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Sudan_Red_G.png/180px-Sudan_Red_G.png" decoding="async" width="180" height="97" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Sudan_Red_G.png/270px-Sudan_Red_G.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Sudan_Red_G.png/360px-Sudan_Red_G.png 2x" data-file-width="813" data-file-height="440" /></a></span></div> <div class="gallerytext"><a href="/wiki/Sudan_Red_G" title="Sudan Red G">Sudan Red G</a></div> </li> </ul> <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=Sudan_stain&action=edit&section=4" title="Edit section: Safety"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some spices exported from Asia have been adulterated with Sudan dyes, especially <a href="/wiki/Sudan_I" title="Sudan I">Sudan I</a> and <a href="/wiki/Sudan_III" title="Sudan III">Sudan III</a>, to enhance their colors. This finding has led to controversy because some Sudan dyes are carcinogenic in rats.<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> </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=Sudan_stain&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Ullmann's_Encyclopedia_of_Industrial_Chemistry-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Ullmann's_Encyclopedia_of_Industrial_Chemistry_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="CITEREFBooth2000" class="citation encyclopaedia cs1">Booth, Gerald (2000). "Dyes, General Survey". <i>Ullmann's Encyclopedia of Industrial Chemistry</i>. Weinheim: Wiley-VCH. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2F14356007.a09_073">10.1002/14356007.a09_073</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/3527306730" title="Special:BookSources/3527306730"><bdi>3527306730</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Dyes%2C+General+Survey&rft.btitle=Ullmann%27s+Encyclopedia+of+Industrial+Chemistry&rft.place=Weinheim&rft.pub=Wiley-VCH&rft.date=2000&rft_id=info%3Adoi%2F10.1002%2F14356007.a09_073&rft.isbn=3527306730&rft.aulast=Booth&rft.aufirst=Gerald&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASudan+stain" class="Z3988"></span></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">Larsen, John Chr. "Legal and illegal colors" Trends in Food Science & Technology (2008), 19(Suppl. 1), S60-S65. <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/10.1016%2Fj.tifs.2008.07.008">10.1016/j.tifs.2008.07.008</a></span> </li> </ol></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 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a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Analytical_reagents" title="Template:Analytical reagents"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Analytical_reagents" title="Template talk:Analytical reagents"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Analytical_reagents" title="Special:EditPage/Template:Analytical reagents"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Analytical_reagents_and_tests328" style="font-size:114%;margin:0 4em">Analytical reagents and tests</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">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/Aluminon" title="Aluminon">Aluminon</a></li> <li><a href="/wiki/Xylenol_orange" title="Xylenol orange">Xylenol orange</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Sugars, fats, and proteins</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Sugars & starches</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Barfoed%27s_test" title="Barfoed's test">Barfoed's test</a> (Monosaccharides)</li> <li><a href="/wiki/Benedict%27s_reagent" title="Benedict's reagent">Benedict's reagent</a> (reducing sugars etc)</li> <li><a href="/wiki/Bial%27s_test" title="Bial's test">Bial's test</a> (pentoses)</li> <li><a href="/wiki/Aniline_acetate_test" title="Aniline acetate test">Aniline acetate test</a> (pentoses)</li> <li><a href="/wiki/Starch_indicator" class="mw-redirect" title="Starch indicator">Starch indicator</a></li> <li><a href="/wiki/Molisch%27s_test" title="Molisch's test">Molisch's test</a> (carbs)</li> <li><a href="/wiki/Tollens%27_reagent" title="Tollens' reagent">Tollens' reagent</a> (reducing sugars)</li> <li><a href="/wiki/Fehling%27s_solution" title="Fehling's solution">Fehling's solution</a> (reducing sugars)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Proteins & amino acids</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Biuret_test" title="Biuret test">Biuret test</a> (proteins)</li> <li><a href="/wiki/Bicinchoninic_acid_assay" title="Bicinchoninic acid assay">Bicinchoninic acid assay</a> (concentration)</li> <li><a href="/wiki/Bradford_protein_assay" title="Bradford protein assay">Bradford protein assay</a> (concentration)</li> <li><a href="/wiki/Lowry_protein_assay" title="Lowry protein assay">Lowry protein assay</a> (total protein)</li> <li><a href="/wiki/Pierce_Protein_Assay" title="Pierce Protein Assay">Pierce Protein Assay</a>/<a href="/wiki/Bicinchoninic_acid_assay" title="Bicinchoninic acid assay">Bicinchoninic acid assay (BCA)</a> (total protein)</li> <li><a href="/wiki/Tollens%27_reagent" title="Tollens' reagent">Tollens' reagent</a> (aldehyde & ketones)</li> <li><a href="/wiki/Fehling%27s_solution" title="Fehling's solution">Fehling's solution</a> (aldehyde & ketones)</li> <li><a href="/wiki/Van_Slyke_determination" title="Van Slyke determination">Van Slyke determination</a> (amino acids)</li> <li><a href="/wiki/Sakaguchi_test" title="Sakaguchi test">Sakaguchi test</a> (arginine)</li> <li><a href="/wiki/Xanthoproteic_reaction" title="Xanthoproteic reaction">Xanthoproteic reaction</a> (proteins)</li> <li><a href="/wiki/Ponceau_S" title="Ponceau S">Ponceau Red</a> (proteins)</li> <li><a href="/wiki/Coomassie_brilliant_blue" title="Coomassie brilliant blue">Coomassie brilliant blue</a> (proteins)</li> <li><a href="/wiki/Silver_staining" title="Silver staining">Silver staining</a> (proteins)</li> <li><a href="/wiki/Medical_uses_of_silver#Colloidal_silver" title="Medical uses of silver">Colloidal_silver</a> (proteins)</li> <li><a href="/wiki/Colloidal_gold" title="Colloidal gold">Colloidal_gold</a> (proteins)</li> <li><a href="/wiki/Amido_black_10B" title="Amido black 10B">Amido black</a> (proteins)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Fats</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink selflink">Sudan stain</a> (lipids)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Alcohols</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/Benedict%27s_reagent" title="Benedict's reagent">Benedict's reagent</a> (aldehyde & ketones etc)</li> <li><a href="/wiki/Denig%C3%A9s%27_reagent" title="Denigés' reagent">Denigés' reagent</a></li> <li><a href="/wiki/Lucas%27_reagent" title="Lucas' reagent">Lucas' reagent</a> (types of alcohols)</li> <li><a href="/wiki/Ceric_ammonium_nitrate" title="Ceric ammonium nitrate">Ceric ammonium nitrate</a> test (alcohols)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Drugs</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/Dille%E2%80%93Koppanyi_reagent" title="Dille–Koppanyi reagent">Dille–Koppanyi reagent</a> (barbiturates etc)</li> <li><a href="/wiki/Ehrlich%27s_reagent" title="Ehrlich's reagent">Ehrlich's reagent</a> (indoles, etc)</li> <li><a href="/wiki/Froehde_reagent" title="Froehde reagent">Froehde reagent</a> (opioids)</li> <li><a href="/wiki/Gallic_acid_reagent" title="Gallic acid reagent">Gallic acid reagent</a> (drug precursor)</li> <li><a href="/wiki/Liebermann_reagent" title="Liebermann reagent">Liebermann reagent</a> (street drugs)</li> <li><a href="/wiki/Mandelin_reagent" title="Mandelin reagent">Mandelin reagent</a> (ketamine)</li> <li><a href="/wiki/Marquis_reagent" title="Marquis reagent">Marquis reagent</a> (MDMA, opiates, etc)</li> <li><a href="/wiki/Mecke_reagent" title="Mecke reagent">Mecke reagent</a></li> <li><a href="/wiki/Drug_checking" title="Drug checking">Drug checking</a></li> <li><a href="/wiki/Simon%27s_reagent" title="Simon's reagent">Simon's reagent</a></li> <li><a href="/wiki/Zimmermann_reagent" title="Zimmermann reagent">Zimmermann reagent</a> (Benzodiazepines)</li> <li><a href="/wiki/Zwikker_reagent" title="Zwikker reagent">Zwikker reagent</a> (barbiturates)</li> <li><a href="/wiki/Salicylate_testing" title="Salicylate testing">Salicylate testing</a></li> <li><a href="/wiki/Folin%27s_reagent" title="Folin's reagent">Folin's reagent</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</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/Dragendorff%27s_reagent" title="Dragendorff's reagent">Dragendorff's reagent</a> (alkaloids)</li> <li><a href="/wiki/Fenton%27s_reagent" title="Fenton's reagent">Fenton's reagent</a> (creates free radicals)</li> <li><a href="/wiki/Folin%E2%80%93Ciocalteu_reagent" title="Folin–Ciocalteu reagent">Folin–Ciocalteu reagent</a> (antioxidants)</li> <li><a href="/wiki/Murexide_test" title="Murexide test">Murexide test</a> (caffeine etc)</li> <li><a href="/wiki/Melzer%27s_reagent" title="Melzer's reagent">Melzer's reagent</a> (fungi)</li> <li><a href="/wiki/Marquis_reagent" title="Marquis reagent">Marquis reagent</a> (various)</li> <li><a href="/wiki/Nitrate_test" title="Nitrate test">Nitrate test</a></li> <li><a href="/wiki/Nitrite_test" title="Nitrite test">Nitrite test</a></li> <li><a href="/wiki/Luminol" title="Luminol">Luminol</a> (blood)</li> <li><a href="/wiki/Pesticide_detection_kit" title="Pesticide detection kit">Pesticide detection kit</a></li> <li><a href="/wiki/Fecal_coliform_detection" class="mw-redirect" title="Fecal coliform detection">Fecal coliform detection</a></li> <li><a href="/w/index.php?title=Prion_detection_kit&action=edit&redlink=1" class="new" title="Prion detection kit (page does not exist)">Prion detection kit</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="font-weight:bold;"><div><span class="nowrap"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Papapishu-Lab-icon-6.svg/15px-Papapishu-Lab-icon-6.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Papapishu-Lab-icon-6.svg/23px-Papapishu-Lab-icon-6.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Papapishu-Lab-icon-6.svg/30px-Papapishu-Lab-icon-6.svg.png 2x" data-file-width="512" data-file-height="512" /></span></span> </span><a href="/wiki/Portal:Chemistry" title="Portal:Chemistry">Chemistry portal</a> <span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <a href="https://commons.wikimedia.org/wiki/Category:Reagents" class="extiw" title="commons:Category:Reagents">Commons</a></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="Microbial_and_histological_stains165" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Stains" title="Template:Stains"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Stains" title="Template talk:Stains"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Stains" title="Special:EditPage/Template:Stains"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Microbial_and_histological_stains165" style="font-size:114%;margin:0 4em"><a href="/wiki/Staining" title="Staining">Microbial and histological stains</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Iron" title="Iron">Iron</a>/<a href="/wiki/Hemosiderin" title="Hemosiderin">hemosiderin</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Perls_Prussian_blue" title="Perls Prussian blue">Perls Prussian blue</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lipid" title="Lipid">Lipids</a></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 class="mw-selflink selflink">Sudan stain</a> <ul><li><a href="/wiki/Sudan_II" title="Sudan II">Sudan II</a></li> <li><a href="/wiki/Sudan_III" title="Sudan III">Sudan III</a></li> <li><a href="/wiki/Sudan_IV" title="Sudan IV">Sudan IV</a></li> <li><a href="/wiki/Oil_Red_O" title="Oil Red O">Oil Red O</a></li> <li><a href="/wiki/Sudan_Black_B" class="mw-redirect" title="Sudan Black B">Sudan Black B</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Carbohydrate" title="Carbohydrate">Carbohydrates</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alcian_blue_stain" title="Alcian blue stain">Alcian blue</a></li> <li><a href="/wiki/Mucicarmine_stain" title="Mucicarmine stain">Mucicarmine</a></li> <li><a href="/wiki/Periodic_acid%E2%80%93Schiff_stain" title="Periodic acid–Schiff stain">Periodic acid–Schiff stain</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Amyloid" title="Amyloid">Amyloid</a></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/Congo_red" title="Congo red">Congo red</a></li> <li><a href="/wiki/Thioflavin" title="Thioflavin">Thioflavin</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Bacteria" title="Bacteria">Bacteria</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gram_stain" title="Gram stain">Gram stain</a> <ul><li><a href="/wiki/Methyl_violet" title="Methyl violet">Methyl violet</a>/<a href="/wiki/Crystal_violet" title="Crystal violet">Gentian violet</a></li> <li><a href="/wiki/Safranin" title="Safranin">Safranin</a></li></ul></li> <li><a href="/wiki/Acid-fastness" title="Acid-fastness">Acid-fast</a> <ul><li><a href="/wiki/Ziehl%E2%80%93Neelsen_stain" title="Ziehl–Neelsen stain">Ziehl–Neelsen stain</a>/<a href="/wiki/Kinyoun_stain" title="Kinyoun stain">Kinyoun stain</a> <ul><li><a href="/wiki/Carbol_fuchsin" title="Carbol fuchsin">Carbol fuchsin</a>/<a href="/wiki/Fuchsine" title="Fuchsine">Fuchsine</a></li> <li><a href="/wiki/Methylene_blue" title="Methylene blue">Methylene blue</a></li></ul></li> <li><a href="/wiki/Auramine%E2%80%93rhodamine_stain" title="Auramine–rhodamine stain">Auramine–rhodamine stain</a> <ul><li><a href="/wiki/Auramine_O" title="Auramine O">Auramine O</a></li> <li><a href="/wiki/Rhodamine_B" title="Rhodamine B">Rhodamine B</a></li></ul></li> <li><a href="/wiki/Auramine_phenol_stain" title="Auramine phenol stain">Auramine phenol stain</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Connective_tissue" title="Connective tissue">Connective tissue</a></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/Trichrome_stain" class="mw-redirect" title="Trichrome stain">trichrome stain</a>: <a href="/wiki/Masson%27s_trichrome_stain" title="Masson's trichrome stain">Masson's trichrome stain</a>/<a href="/wiki/Lillie%27s_trichrome" title="Lillie's trichrome">Lillie's trichrome</a> <ul><li><a href="/wiki/Light_Green_SF_yellowish" class="mw-redirect" title="Light Green SF yellowish">Light Green SF yellowish</a></li> <li><a href="/wiki/Biebrich_scarlet" title="Biebrich scarlet">Biebrich scarlet</a></li> <li><a href="/wiki/Phosphomolybdic_acid" title="Phosphomolybdic acid">Phosphomolybdic acid</a></li> <li><a href="/wiki/Fast_Green_FCF" title="Fast Green FCF">Fast Green FCF</a></li> <li><a href="/wiki/Sirius_Red" title="Sirius Red">Sirius Red</a></li></ul></li></ul> <ul><li><a href="/wiki/Van_Gieson%27s_stain" title="Van Gieson's stain">Van Gieson's stain</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</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/Cresyl_violet" title="Cresyl violet">Cresyl violet</a></li> <li><a href="/wiki/Cyanine" title="Cyanine">Cyanine</a></li> <li><a href="/wiki/Jaswant_Singh%E2%80%93Bhattacharji_(JSB)_stain" class="mw-redirect" title="Jaswant Singh–Bhattacharji (JSB) stain">Jaswant Singh–Bhattacharji (JSB) stain</a></li> <li><a href="/wiki/H%26E_stain" title="H&E stain">H&E stain</a> <ul><li><a href="/wiki/Haematoxylin" title="Haematoxylin">Haematoxylin</a></li> <li><a href="/wiki/Eosin_Y" title="Eosin Y">Eosin Y</a></li></ul></li> <li><a href="/wiki/Janus_Green_B" title="Janus Green B">Janus Green B</a></li> <li><a href="/wiki/Giemsa_stain" title="Giemsa stain">Giemsa stain</a></li> <li><a href="/wiki/G%C3%B6m%C3%B6ri_trichrome_stain" title="Gömöri trichrome stain">Gömöri trichrome stain</a></li> <li><a href="/wiki/Luxol_fast_blue_stain" title="Luxol fast blue stain">Luxol fast blue stain</a></li> <li><a href="/wiki/Methyl_blue" title="Methyl blue">Methyl blue</a></li> <li><a href="/wiki/Moeller_stain" title="Moeller stain">Moeller stain</a></li> <li><a href="/wiki/Movat%27s_stain" title="Movat's stain">Movat's stain</a></li> <li><a href="/wiki/Neutral_red" title="Neutral red">Neutral red</a></li> <li><a href="/wiki/Schaeffer%E2%80%93Fulton_stain" title="Schaeffer–Fulton stain">Schaeffer–Fulton stain</a></li> <li><a href="/wiki/Silver_stain" class="mw-redirect" title="Silver stain">Silver stain</a> <ul><li><a href="/wiki/Bielschowsky_stain" title="Bielschowsky stain">Bielschowsky stain</a></li> <li><a href="/wiki/Grocott%27s_methenamine_silver_stain" title="Grocott's methenamine silver stain">Grocott's methenamine silver stain</a></li> <li><a href="/wiki/Warthin%E2%80%93Starry_stain" title="Warthin–Starry stain">Warthin–Starry stain</a></li></ul></li> <li><a href="/wiki/Wright%27s_stain" title="Wright's stain">Wright's stain</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Tissue stainability</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/Acidophile_(histology)" title="Acidophile (histology)">Acidophilic</a></li> <li><a href="/wiki/Basophilic" title="Basophilic">Basophilic</a></li> <li><a href="/wiki/Chromophobe" class="mw-redirect" title="Chromophobe">Chromophobic</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=1" 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=Sudan_stain&oldid=1217036631">https://en.wikipedia.org/w/index.php?title=Sudan_stain&oldid=1217036631</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" 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