2,5-Dichloro-4-{4-{3-[(ethylphenylamino)-sulfonyl]-methylphenylazo}-4,5-dih

sodium 2,5-dichloro-4-[4-[[3-[(ethylphenylamino)sulphonyl]-p-tolyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonate

Benzenesulfonic acid, 2,5-dichloro-4-4-3-(ethylphenylamino)sulfonyl-4-methylphenylazo-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl-, sodium salt

2,5-Dichloro-4-[[4-[[3-[(ethylphenylamino)sulfonyl]-4-methylphenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol]-1-yl]benzenesulfonic acid sodium salt