2-Naphthalenesulfonic acid, 6-amino-5-((4-(benzoylamino)phenyl)azo)-4-hydroxy-, monosodium salt 2-Naphthalenesulfonic acid, 6-amino-5-(4-(benzoylamino)phenylazo)-4-hydroxy-, sodium salt 67875-13-2 EINECS 267-527-8 Sodium 6-amino-5-((4-(benzoylamino)phenyl)azo)-4-hydroxynaphthalene-2-sulphonate