73514-03-1 Cuprate(4-), (mu-((4,4'-(methylenebis((2-(hydroxy-kappaO)-4,1-phenylene)azo-kappaN1))bis(3-(hydroxy-kappaO)-2,7-naphthalenedisulfonato))(8-)))di-, tetrasodium Cuprate(4-), (mu-((4,4'-(methylenebis((2-hydroxy-4,1-phenylene)azo))bis(3-hydroxy-2,7-naphthalenedisulfonato))(8-)))di-, tetrasodium EINECS 277-522-2 Tetrasodium (mu-((4,4'-(methylenebis((2-hydroxy-p-phenylene)azo))bis(3-hydroxynaphthalene-2,7-disulphonato))(8-)))dicuprate(4-)