Synonyms: Cuprate(3-), (mu-(4-((3,3'-di(hydroxy-kappaO)-4'-((2-(hydroxy-kappaO)-6-sulfo-1-naphthalenyl)azo-kappaN1)(1,1'-biphenyl)-4-yl)azo-kappaN1)-3-(hydroxy-kappaO)-2,7-naphthalenedisulfonato(7-)))di-, triammonium;Cuprate(3-), (mu-(4-(2-(3,3'-di(hydroxy-kappaO)-4'-(2-(2-(hydroxy-kappaO)-6-sulfo-1-naphthalenyl)diazenyl-kappaN1)(1,1'-biphenyl)-4-yl)diazenyl-kappaN1)-3-(hydroxy-kappaO)-2,7-naphthalenedisulfonato(7-)))di-, ammonium (1:3);Triammonium (mu-(4-((3,3'-dihydroxy-4'-((2-hydroxy-6-sulpho-1-naphthyl)azo)(1,1'-biphenyl)-4-yl)azo)-3-hydroxynaphthalene-2,7-disulphonato(7-)))dicuprate(3-);ammonium copper(2+) 4-[(E)-{3,3'-dioxido-4'-[(E)-(2-oxido-6-sulfonatonaphthalen-1-yl)diazenyl]biphenyl-4-yl}diazenyl]-3-oxidonaphthalene-2,7-disulfonate (3:2:1)