2-Naphthalenesulfonic acid,6-amino-5-[(4-aminophenyl)azo]-4-hydroxy-(9CI), 6-Amino-5-(4-aminophenylazo)-4-hydroxy-2-naphthalenesulfonic acid, 6-Amino-5-((4-aminophenyl)azo)-4-hydroxynaphthalene-2-sulphonic acid, 2-Naphthalenesulfonicacid,6-amino-5-[2-(4-aminophenyl)diazenyl]-4-hydroxy, 1-Naphthol-3-sulfonicacid,7-amino-8-(p-aminophenylazo)-(6CI), EINECS 261-949-6