Allura Red AC Dye Properties, Molecular Formula, Applications - WorldOfChemicals

Allura Red AC Dye Properties

Allura Red AC Dye

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Molecule Structure Image



Allura Red AC Dye is a red azo dye. It is used as a food dye and has the E number E129. Allura Red AC was originally introduced in the United States.It has the appearance of a dark red powder. Allura Red AC usually comes as a sodium salt, but can also be used as both calcium and potassium salts. It is soluble in water; in solution, its maximum absorbance lies at about 504 nm.Allura Red AC has fewer health risks associated with it in comparison to other azo dyes.

Chemical Properties

Appearance Red powder
CAS Number 25956-17-6
IUPAC Name Disodium 6-hydroxy-5-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonate
InChI 1S/C18H16N2O8S2.2Na/c1-10-7-14(16(28-2)9-17(10)30(25,26)27)19-20-18-13-5-4-12(29(22,23)24)8-11(13)3-6-15(18)21;;/h3-9,21H,1-2H3,(H,22,23,24)(H,25,26,27);;/q;2*+1/p-2/b20-19+;;
Molar Mass 496.42 g/mol
Molecular Formula C18H14N2Na2O8S2
Synonyms Allura Red;Food Red 17;C.I. 16035;FD&C Red 40;E129;2-Naphthalenesulfonic acid, 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfophenyl)azo)-, disodium salt;Allura Red AC