2-Naphthalenesulfonic acid, 6-amino-5-((4-(benzoylamino)-3-sulfophenyl)azo)-4-hydroxy-, disodium salt 67875-08-5 Disodium 6-amino-5-((4-(benzoylamino)-3-sulphonatophenyl)azo)-4-hydroxynaphthalene-2-sulphonate EINECS 267-522-0