1-Naphthalenesulfonic acid, 4,4'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(iminocarbonyl(2-hydroxy-4,1-phenylene)azo))bis(3-hydroxy-, disodium salt 1-Naphthalenesulfonic acid, 4,4'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(iminocarbonyl(2-hydroxy-4,1-phenylene)azo))bis(3-hydroxy-, disodiumsalt 70247-69-7 Disodium 4,4'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(iminocarbonyl(2-hydroxy-4,1-phenylene)azo))bis(3-hydroxynaphthalene-1-sulphonate) EINECS 274-498-5