Synonyms: Cuprate(3-), (mu-(4-((3,3'-di(hydroxy-kappaO)-4'-((1-(hydroxy-kappaO)-4-sulfo-2-naphthalenyl)azo-kappaN1)(1,1'-biphenyl)-4-yl)azo-kappaN1)-3-(hydroxy-kappaO)-2,7-naphthalenedisulfonato(7-)))di-, trisodium;Cuprate(3-), (mu-(4-(2-(3,3'-di(hydroxy-kappaO)-4'-(2-(1-(hydroxy-kappaO)-4-sulfo-2-naphthalenyl)diazenyl-kappaN1)(1,1'-biphenyl)-4-yl)diazenyl-kappaN1)-3-(hydroxy-kappaO)-2,7-naphthalenedisulfonato(7-)))di-, sodium (1:3);Trisodium (mu-(4-((3,3'-dihydroxy-4'-((1-hydroxy-4-sulpho-2-naphthyl)azo)(1,1'-biphenyl)-4-yl)azo)-3-hydroxynaphthalene-2,7-disulphonato(7-)))dicuprate(3-);copper(2+) sodium 4-[(E)-{3,3'-dioxido-4'-[(E)-(1-oxido-4-sulfonatonaphthalen-2-yl)diazenyl]biphenyl-4-yl}diazenyl]-3-oxidonaphthalene-2,7-disulfonate (2:3:1)