Synonyms: Cuprate(3-), (4-(hydroxy-kappaO)-3-(2-(2-(hydroxy-kappaO)-5-sulfophenyl)diazenyl-kappaN1)-5-((2,5,6-trichloro-4-pyrimidinyl)amino)-2,7-naphthalenedisulfonato(5-))-, hydrogen (1:3);Cuprate(3-), (4-(hydroxy-kappaO)-3-((2-(hydroxy-kappaO)-5-sulfophenyl)azo-kappaN1)-5-((2,5,6-trichloro-4-pyrimidinyl)amino)-2,7-naphthalenedisulfonato(5-))-, trihydrogen;Trihydrogen (4-hydroxy-3-((2-hydroxy-5-sulphophenyl)azo)-5-((2,5,6-trichloro-4-pyrimidinyl)amino)naphthalene-2,7-disulphonato(5-))cuprate(3-);copper(2+) hydrogen 4-oxido-3-[(E)-(2-oxido-5-sulfonatophenyl)diazenyl]-5-[(2,5,6-trichloropyrimidin-4-yl)amino]naphthalene-2,7-disulfonate (1:3:1)