Synonyms: sodium 3-[[5-[[4-[[4-[(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo]anilino]carbonyl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-4-hydroxybenzenesulphonate;Benzenesulfonic acid, 3-[[5-[[4-[[[4-[(4,5-dihydro- 3-methyl-5-oxo-1H-pyrazol-4-yl)azo]phenyl]amino ]carbonyl]phenyl]azo]-2,4-dihydroxyphenyl]azo]- 4-hydroxy-, monosodium salt;3-[[5-[[4-[[[4-[[(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol)-4-yl]azo]phenyl]amino]carbonyl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-4-hydroxybenzenesulfonic acid sodium salt;Einecs 286-212-6;Sodium 3-((5-((4-((4-((4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)anilino)carbonyl)phenyl)azo)-2,4-dihydroxyphenyl)azo)-4-hydroxybenzenesulphonate