2-Naphthalenesulfonic acid, 8-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)-5-((4-((phenylsulfonyl)oxy)phenyl)azo)-, disodium salt 72986-61-9 Disodium 8-((4-((4-nitro-2-sulphonatophenyl)amino)phenyl)azo)-5-((4-((phenylsulphonyl)oxy)phenyl)azo)naphthalene-2-sulphonate EINECS 277-177-8 Naphthalene-2-sulfonic acid, 8-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)-5-((4-((phenylsulfonyl)oxy)phenyl)azo)-, disodium salt