2-Naphthalenesulfonic acid, 3-((4-(acetylamino)phenyl)azo)-7-amino-4-hydroxy-, monosodium salt 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((4-acetamidophenyl)azo)-, monosodium salt 68201-76-3 EINECS 269-236-1 Sodium 3-((4-acetamidophenyl)azo)-7-amino-4-hydroxynaphthalene-2-sulphonate