Synonyms: Chromate(5-), bis(5-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-4-hydroxy-3-benzenedisulfonato(4-))-, tetrasodium hydrogen;Chromate(5-), bis(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 hydrogen (1:4:1);Tetrasodium hydrogen bis(5-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-4-hydroxybenzene-x,3-disulphonato(4-))chromate(5-);chromium(3+) hydrogen sodium 5-[(E)-(3-methyl-5-oxido-1-phenyl-1H-pyrazol-4-yl)diazenyl]-4-oxidobenzene-1,3-disulfonate (1:1:4:2)