Synonyms: Chromate(3-),bis[3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitrobenzenesulfonato(3-)]-,sodium dihydrogen; Chromate(3-), bis[3-[[4,5-dihydro-3-methyl-5-(oxo-kO)-1-phenyl-1H-pyrazol-4-yl]azo-kN1]-2-(hydroxy-kO)-5-nitrobenzenesulfonato(3-)]-,sodium dihydrogen (9CI); Benzenesulfonic acid,3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitro-,chromium complex