2-Naphthalenesulfonic acid, 8-amino-5-((4-aminophenyl)azo)- 8-Amino-5-((p-aminophenyl)azo)-2-naphthalenesulfonic acid 8-Amino-5-((p-aminophenyl)azo)naphthalene-2-sulphonic acid 85-67-6 EINECS 201-621-1