2-Chloro-4-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-5-hydroxybenzenesulfonamide 2-Chloro-4-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-5-hydroxybenzenesulphonamide 66693-29-6 68227-63-4 Benzenesulfonamide, 2-chloro-4-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)-5-hydroxy- EINECS 269-374-2