Synonyms: Cuprate(2-), (4-(4,5-dihydro-4-(2-(2-(hydroxy-kappaO)-5-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl-kappaN1)-3-methyl-5-(oxo-kappaO)-1H-pyrazol-1-yl)benzenesulfonato(4-))-, potassium (1:2);Cuprate(2-), (4-(4,5-dihydro-4-((2-(hydroxy-kappaO)-5-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo-kappaN1)-3-methyl-5-(oxo-kappaO)-1H-pyrazol-1-yl)benzenesulfonato(4-))-, dipotassium;Dipotassium (4-(4,5-dihydro-4-((2-hydroxy-5-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonato(4-))cuprate(2-);copper(2+) potassium 4-{3-methyl-5-oxido-4-[(E)-(2-oxido-5-{[2-(sulfonatooxy)ethyl]sulfonyl}phenyl)diazenyl]-1H-pyrazol-1-yl}benzenesulfonate (1:2:1)