2-Naphthalenesulfonic acid, 3-((4-((4-sulfophenyl)azo)-3-methylphenyl)azo)-4-hydroxy-6-phenylamino-, disodium salt 2-Naphthalenesulfonic acid, 4-hydroxy-3-((3-methyl-4-((4-sulfophenyl)azo)phenyl)azo)-6-(phenylamino)-, disodium salt 67990-24-3 Disodium 4-hydroxy-3-((3-methyl-4-((4-sulphonatophenyl)azo)phenyl)azo)-6-(phenylamino)naphthalene-2-sulphonate EINECS 268-047-1