Synonyms: 3-[[1-(4-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-4-hydroxy-N-methylbenzenesulphonamide;N-Methyl-3-[1-(4-chlorophenyl)-3-methyl-5-oxo-2-pyrazolin-4-ylazo]-4-hydroxybenzenesulfonamide;3-((1-(4-Chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-4-hydroxy-N-methylbenzenesulfonamide;3-((1-(4-Chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-4-hydroxy-N-methylbenzenesulphonamide;Benzenesulfonamide, 3-((1-(4-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-4-hydroxy-N-methyl-;Benzenesulfonamide, 3-(2-(1-(4-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)diazenyl)-4-hydroxy-N-methyl-;Einecs 269-369-5