4,5-Dihydro-5-oxo-4-((m-tolyl)azo)-1H-pyrazole-3-carboxylic acid, 1H-Pyrazole-3-carboxylic acid,4,5-dihydro-4-(2-(3-methylphenyl)diazenyl)-5-oxo, 5-Oxo-4-(m-tolylazo)-2-pyrazolin-3-carboxylic acid, EINECS 266-280-3, 1H-Pyrazole-3-carboxylic acid,4,5-dihydro-4-((3-methylphenyl)azo)-5-oxo,