1-Naphthalenesulfonic acid, 8-((4-methylphenyl)amino)-5-((4-(phenylazo)-7-sulfo-1-naphthalenyl)azo)-, disodium salt 6406-32-2 Disodium 8-((4-methylphenyl)amino)-5-((4-(phenylazo)-7-sulphonatonaphthyl)azo)naphthalenesulphonate EINECS 229-027-8