Synonyms: Chromate(1-), (2-(2-(4,5-dihydro-3-methyl-1-(2-methyl-4-sulfophenyl)-5-(oxo-kappaO)-1H-pyrazol-4-yl)diazenyl-kappaN1)-4-sulfobenzoato(4-)-kappaO)-, sodium (1:1);Chromate(1-), (2-((4,5-dihydro-3-methyl-1-(2-methyl-4-sulfophenyl)-5-oxo-1H-pyrazol-4-yl)azo)-4-sulfobenzoato(4-))-, sodium;Sodium (2-((4,5-dihydro-3-methyl-1-(2-methyl-4-sulphophenyl)-5-oxo-1H-pyrazol-4-yl)azo)-4-sulphobenzoato(4-))chromate(1-);chromium(3+) sodium 2-{(E)-[3-methyl-1-(3-methyl-5-sulfonatophenyl)-5-oxido-1H-pyrazol-4-yl]diazenyl}-4-sulfonatobenzoate (1:1:1)