Red No.502

Legal color:	Red No.502
General name:	Ponceau 3R
Class:
FDA :
CI #:	C.I. 16155
Color #:	Food Red 6
CAS #:	3564-09-8
IUPAC:	→1;Disodium 3-hydroxy-4-(2,4,5-trimethylphenylazo)-2,7-naphthalenesulfonate →2;3-Hydroxy-4-(2,4,5-trimethylphenylazo)-2,7-naphthalenesulfonic acid disodium salt
Chemical structure :