Synonyms: Cuprate(3-), (mu-(3-((3,3'-di(hydroxy-kappaO)-4'-((2-(hydroxy-kappaO)-8-hydroxy-6-sulfo-1-naphthalenyl)azo-kappaN1)(1,1'-biphenyl)-4-yl)azo-kappaN1)-4-(hydroxy-kappaO)-5-hydroxy-2,7-naphthalenedisulfonato(7-)))di-, trisodium;Cuprate(3-), (mu-(3-(2-(3,3'-di(hydroxy-kappaO)-4'-(2-(2-(hydroxy-kappaO)-8-hydroxy-6-sulfo-1-naphthalenyl)diazenyl-kappaN1)(1,1'-biphenyl)-4-yl)diazenyl-kappaN1)-4-(hydroxy-kappaO)-5-hydroxy-2,7-naphthalenedisulfonato(7-)))di-, sodium (1:3);Trisodium (mu-(3-((4'-((2,8-dihydroxy-6-sulpho-1-naphthyl)azo)-3,3'-dihydroxy(1,1'-biphenyl)-4-yl)azo)-4,5-dihydroxynaphthalene-2,7-disulphonato(7-)))dicuprate(3-);dicopper(2+) trisodium 3-(2-{4'-[2-(2,8-dioxo-6-sulfonato-2,8-dihydronaphthalen-1-yl)hydrazino]-3',4-dioxidobiphenyl-3-yl}hydrazino)-4,5-dioxidonaphthalene-2,7-disulfonate