2-Naphthalenesulfonic acid, 5-((4-(N-ethyl-N-(3-sulfobenzyl)amino)phenyl)azo)-8-phenylazo-, disodium salt 2-Naphthalenesulfonic acid, 5-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)azo)-8-(phenylazo)-, disodium salt 62133-79-3 Disodium 5-((4-(ethyl((3-sulphonatophenyl)methyl)amino)phenyl)azo)-8-(phenylazo)naphthalene-2-sulphonate EINECS 263-425-2