sodium 4-chloro-3-[[1-(4-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]benzenesulphonate

4-Chloro-3-[[[1-(4-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol]-4-yl]azo]benzenesulfonic acid sodium salt

Benzenesulfonic acid, 4-chloro-3-[[1-(4-chlorophenyl) -4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl ]azo]-, sodium salt