2-Naphthalenesulfonic acid, 5-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-8-((4-(phenylazo)-7-sulfo-1-naphthalenyl)azo)-, trisodium salt 6406-87-7 EINECS 229-035-1 Trisodium 5-((7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-8-((4-(phenylazo)-7-sulphonatonaphthyl)azo)naphthalene-2-sulphonate