2-Naphthalenesulfonic acid, 5-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-8-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)-, disodium salt 72968-80-0 Disodium 5-((4-(((4-methylphenyl)sulphonyl)oxy)phenyl)azo)-8-((4-((4-nitro-2-sulphonatophenyl)amino)phenyl)azo)naphthalene-2-sulphonate EINECS 277-154-2 Naphthalene-2-sulfonic acid, 5-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-8-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)-, disodium salt