Synonyms: | (mu-((3,3'-(Azoxybis((2-hydroxy-p-phenylene)azo))bis(4-hydroxynaphthalene-2,7-disulphonato))(8-)))dicopper, tetrasodium salt;Copper, (mu-((3,3'-((1-oxido-1,2-diazenediyl)bis((2-(hydroxy-kappaO)-4,1-phenylene)-2,1-diazenediyl-kappaN1))bis(4-(hydroxy-kappaO)-2,7-naphthalenedisulfonato))(8-)))di-, sodium (1:4);Copper, (mu-((3,3'-(azoxybis((2-(hydroxy-kappaO)-4,1-phenylene)azo-kappaN1))bis(4-(hydroxy-kappaO)-2,7-naphthalenedisulfonato))(8-)))di-, tetrasodium;Copper, (mu-((3,3'-(azoxybis((2-hydroxy-4,1-phenylene)azo))bis(4-hydroxy-2,7-naphthalenesulfonato))(8-)))di-, tetrasodium |