1-Naphthalenesulfonic acid, 3-((4-(benzoylethylamino)-2-methylphenyl)azo)-4-hydroxy-, monosodium salt 6245-59-6 EINECS 228-358-5 Sodium 3-((4-(benzoylethylamino)-2-methylphenyl)azo)-4-hydroxynaphthalene-1-sulphonate