2-Naphthalenesulfonic acid, 6-amino-5-((4-(benzoylamino)-2-sulfophenyl)azo)-4-hydroxy-, disodium salt 63192-51-8 Disodium 6-amino-5-((4-(benzoylamino)-2-sulphonatophenyl)azo)-4-hydroxynaphthalene-2-sulphonate EINECS 263-993-1