Allura Red AC photograph

Allura Red AC

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Molar mass496. 42 g/mol
FormulaC18H14N2Na2O8S2
IUPAC IDdisodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfophenyl)azo)-2-naphthalenesulfonate
Melting point> 300 °C (572 °F; 573 K)
Soluble in Water
UNIIWZB9127XOA
Date of Reg.
Date of Upd.
ID867677
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About Allura Red AC


Allura Red AC is a red azo dye that goes by several names, including FD&C Red 40. It is used as a food dye and has the E number E129. It is usually supplied as its red sodium salt, but can also be used as the calcium and potassium salts. These salts are soluble in water.

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