1,3,6-Naphthalenetrisulfonic acid, 7-((4-amino-2-((aminocarbonyl)amino)phenyl)azo)-, disodium salt 7-((4-Amino-2-ureidophenyl)azo)-1,3,6-naphthalenetrisulfonic acid, disodium salt 70714-85-1 Disodium hydrogen -7-((4-amino-2-((aminocarbonyl)amino)phenyl)azo)naphthalene-1,3,6-trisulphonate EINECS 274-809-4