sodium p-[4,5-dihydro-3-methyl-4-[[3-[(p-tolylamino)sulphonyl]-p-tolyl]azo]-5-oxo-1H-pyrazol-1-yl]benzenesulphonate

Benzenesulfonic acid, 4-4,5-dihydro-3-methyl-4-4-methyl-3-(4-methylphenyl)aminosulfonylphenylazo-5-oxo-1H-pyrazol-1-yl-, monosodium salt

4-[[4,5-Dihydro-3-methyl-4-[[4-methyl-3-[[(4-methylphenyl)amino]sulfonyl]phenyl]azo]-5-oxo-1H-pyrazol]-1-yl]benzenesulfonic acid sodium salt