2,5-Dichloro-4-(4-((4-chlorophenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid 67846-58-6 Benzenesulfonic acid, 2,5-dichloro-4-(4-((4-chlorophenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)- EINECS 267-372-6