2-Naphthalenesulfonic acid, 6-amino-3-((4'-((6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-, disodium salt 66214-52-6 Disodium 6-amino-3-((4'-((6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-4-hydroxynaphthalene-2-sulphonate EINECS 266-252-0