Synonyms: Cuprate(2-), (5-(2-(4,5-dihydro-3-methyl-5-(oxo-kappaO)-1-phenyl-1H-pyrazol-4-yl)diazenyl-kappaN1)-4-(hydroxy-kappaO)-1,3-benzenedisulfonato(4-))-, sodium (1:2);Cuprate(2-), (5-((4,5-dihydro-3-methyl-5-(oxo-kappaO)-1-phenyl-1H-pyrazol-4-yl)azo-kappaN1)-4-(hydroxy-kappaO)-1,3-benzenedisulfonato(4-))-, disodium;Cuprate(2-), (5-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-4-hydroxy-1,3-benzenedisulfonato(4-))-, disodium;Disodium (5-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-4-hydroxybenzene-1,3-disulphonato(4-))cuprate(2-)