1-Phenol-2-sulfonicacid, 4-chloro-6-(3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-ylazo)- (6CI);Benzenesulfonic acid,5-chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-(9CI); C.I. Mordant Red 19 (8CI)
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