2-Naphthalenesulfonic acid, 8-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-5-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)-, disodium salt 72968-81-1 Disodium 8-((4-(((4-methylphenyl)sulphonyl)oxy)phenyl)azo)-5-((4-((4-nitro-2-sulphonatophenyl)amino)phenyl)azo)naphthalene-1-sulphonate EINECS 277-155-8 Naphthalene-2-sulfonic acid, 8-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-5-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)-, disodium salt