Synonyms: Chromate(1-), (3-(2-(4,5-dihydro-3-methyl-5-(oxo-kappaO)-1-phenyl-1H-pyrazol-4-yl)diazenyl-kappaN1)-2-(hydroxy-kappaO)-5-nitrobenzenesulfonato(3-))hydroxy-, hydrogen (1:1);Chromate(1-), (3-((4,5-dihydro-3-methyl-5-(oxo-kappaO)-1-phenyl-1H-pyrazol-4-yl)azo-kappaN1)-2-(hydroxy-kappaO)-5-nitrobenzenesulfonato(3-))hydroxy-, hydrogen, (T-4)-;Chromate(1-), (3-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-2-hydroxy-5-nitrobenzenesulfonato(3-))hydroxy-, hydrogen;Hydrogen (3-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-2-hydroxy-5-nitrobenzenesulphonato(3-))hydroxychromate(1-);chromium(3+) hydrogen hydroxide 3-[(E)-(3-methyl-5-oxido-1-phenyl-1H-pyrazol-4-yl)diazenyl]-5-nitro-2-oxidobenzenesulfonate (1:1:1:1)