Synonyms: Benzenesulfonicacid,2-[[1-(2-chloro-6-methylphenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-4-[[(3-chloro-1-oxido-1,2,4-benzotriazin-7-yl)carbonyl]amino]-,monosodium salt (9CI); Benzenesulfonic acid, 4-[[(3-chloro-1,2,4-benzotriazin-7-yl)carbonyl]amino]-2-[[1-(2-chloro-6-methylphenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-,N4-oxide, monosodium salt; 1,2,4-Benzotriazine, benzenesulfonic acid deriv.