2-Naphthalenesulfonic acid, 5,5'-((1-methylethylidene)bis(4,1-phenyleneoxysulfonyl-2,1-phenyleneazo))bis(6-amino-4-hydroxy-, disodium salt 2-Naphthalensulfonic acid, 5,5'-((1-methylethylidene)bis(4,1-phenyleneoxysulfonyl-2,1-phenyleneazo))bis(6-amino-4-hydroxy-, disodium salt 4,4'-Bis(((2-((2-amino-8-hydroxy-6-sulfonapth-1-yl)azo)phenyl)sulfonyl)oxy)-2,2-diphenylpropane, disodium salt 52333-30-9 Disodium 5,5'-((1-methylethylidene)bis(4,1-phenyleneoxysulphonyl-2,1-phenyleneazo))bis(6-amino-4-hydroxynaphthalene-2-sulphonate) EINECS 257-854-4