Synonyms: Benzenesulfonic acid, 2-(2-(1-(2-chloro-6-methylphenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)diazenyl)-4-((4-chloro-6-(phenylamino)-1,3,5-triazin-2-yl)amino)-, sodium salt (1:1);Benzenesulfonic acid, 2-((1-(2-chloro-6-methylphenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-4-((4-chloro-6-(phenylamino)-1,3,5-triazin-2-yl)amino)-, monosodium salt;Sodium 4-((6-anilino-4-chloro-1,3,5-triazin-2-yl)amino)-2-((1-(2-chloro-6-methylphenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)amino)benzenesulphonate;sodium 2-{(E)-[1-(2-chloro-6-methylphenyl)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}-4-{[4-chloro-6-(phenylamino)-1,3,5-triazin-2-yl]amino}benzenesulfonate