3-(3-Methyl-5-imino-2-pyrazolin-1-yl)benzenesulfonic acid 68083-38-5 Benzenesulfonic acid, 3-(4,5-dihydro-5-imino-3-methyl-1H-pyrazol-1-yl)- EINECS 268-387-0 m-(4,5-Dihydro-5-imino-3-methyl-1H-pyrazol-1-yl)benzenesulphonic acid