2-Naphthalenesulfonic acid, 3-((4-(acetylamino)phenyl)azo)-6-amino-4-hydroxy-, monosodium salt 2-Naphthalenesulfonic acid, 6-amino-3-((4-acetamidophenyl)azo)-4-hydroxy-, sodium salt 67893-46-3 EINECS 267-620-3 Sodium 3-((4-acetamidophenyl)azo)-6-amino-4-hydroxynaphthalene-2-sulphonate