Chemical Name: 6-Hydroxy-5-[2-(4-sulfophenyl)diazenyl]-2-naphthalenesulfonic Acid Sodium Salt; 1-p-Sulfophenylazo-2-hydroxynaphthalene-6-sulfonate Disodium Salt
Synonym: Dye sunset yellow
Smile: O=S(C1=CC=C2C(/N=N/C3=CC=C(S(=O)([O-])=O)C=C3)=C(O)C=CC2=C1)([O-])=O.[Na+].[Na+]