118-47-8 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)- 2-Pyrazoline-3-carboxylic acid, 5-oxo-1-(p-sulfophenyl)- (6CI,7CI,8CI) 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic acid 5-Oxo-1-(4-sulphophenyl)-2-pyrazoline-3-carboxylic acid BRN 0689305 EINECS 204-254-5 NSC 50665 PYT Pyrazolone T