Einecs 229-111-4

3-Carboxy-1-(2,5-disulfophenyl)-2-pyrazolin-5-one

1-(2,5-Disulfophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid

1-(2,5-disulphophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid