2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-8-((3-sulfophenyl)azo)- 6-Amino-1-hydroxy-5-((3-sulfophenyl)azo)-3-naphthalenesulfonic acid 67906-61-0 7-Amino-4-hydroxy-8-((3-sulphophenyl)azo)naphthalene-2-sulphonic acid EINECS 267-729-6