color Red 40 lake
<p ><b>Allura Red AC</b> is a red <a href="http://en.wikipedia.org/wiki/Azo_dye" title="Azo dye" class="mw-redirect" >azo dye</a> that goes by several names including: <b>Allura Red</b>, <b>Food Red 17</b>, <b>C.I. 16035</b>, <b>FD&C Red 40</b>,<sup id="cite_ref-Shampoo_0-0" class="reference" ><a href="http://en.wikipedia.org/wiki/Allura_Red_AC#cite_note-Shampoo-0" >[1]</a></sup><sup id="cite_ref-Food_Colour_Facts_1-0" class="reference" ><a href="http://en.wikipedia.org/wiki/Allura_Red_AC#cite_note-Food_Colour_Facts-1" >[2]</a></sup> 2-naphthalenesulfonic acid, 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfophenyl)azo)-, disodium salt, and disodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfophenyl)azo)-2-naphthalenesulfonate. </p>
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It is used as a food dye and has the <a href="http://en.wikipedia.org/wiki/E_number" title="E number" >E number</a> E129. Allura Red AC was originally introduced in the <a href="http://en.wikipedia.org/wiki/United_States" title="United States" >United States</a> as a replacement for the use of <a href="http://en.wikipedia.org/wiki/Amaranth_(dye)" title="Amaranth (dye)" >amaranth</a> as a <a href="http://en.wikipedia.org/wiki/Food_coloring" title="Food coloring" >food coloring</a>.<sup class="Template-Fact" >[<i><a href="http://en.wikipedia.org/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed" >citation needed</a></i>]</sup></p>
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It has the appearance of a dark <a href="http://en.wikipedia.org/wiki/Red" title="Red" >red</a> <a href="http://en.wikipedia.org/wiki/Powder_(substance)" title="Powder (substance)" >powder</a>. It usually comes as a sodium salt, but can also be used as both <a href="http://en.wikipedia.org/wiki/Calcium" title="Calcium" >calcium</a> and <a href="http://en.wikipedia.org/wiki/Potassium" title="Potassium" >potassium</a> salts. It is soluble in <a href="http://en.wikipedia.org/wiki/Water" title="Water" >water</a>; in <a href="http://en.wikipedia.org/wiki/Solution" title="Solution" >solution</a>, its maximum <a href="http://en.wikipedia.org/wiki/Absorbance" title="Absorbance" >absorbance</a> lies at about 504 nm<sup id="cite_ref-2" class="reference" ><a href="http://en.wikipedia.org/wiki/Allura_Red_AC#cite_note-2" >[3]</a></sup><sup >p.921</sup>. Its melting point is above 300 degrees Celsius.</p>
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Allura Red AC is one of many <a href="http://en.wikipedia.org/wiki/High_Production_Volume_Chemicals" title="High Production Volume Chemicals" class="mw-redirect" >High Production Volume Chemicals</a>.</p>
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Red AC was originally manufactured from <a href="http://en.wikipedia.org/wiki/Coal_tar" title="Coal tar" >coal tar</a>, but is now mostly made from <a href="http://en.wikipedia.org/wiki/Petroleum" title="Petroleum" >petroleum</a>. Despite the popular
misconception, Allura Red AC is not derived from any insect, unlike the food colouring <a href="http://en.wikipedia.org/wiki/Carmine" title="Carmine" >carmine</a>, which is
derived from the female <a href="http://en.wikipedia.org/wiki/Cochineal" title="Cochineal" >cochineal</a> insect.</p>
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Related dyes include <a href="http://en.wikipedia.org/wiki/Sunset_Yellow_FCF" title="Sunset Yellow FCF" >Sunset Yellow FCF</a>, <a href="http://en.wikipedia.org/wiki/Scarlet_GN" title="Scarlet GN" >Scarlet GN</a>, <a href="http://en.wikipedia.org/wiki/Tartrazine" title="Tartrazine" >tartrazine</a>, and <a href="http://en.wikipedia.org/wiki/Orange_B" title="Orange B" >Orange B</a>.</p>