2-Pyrazolin-5-one,4-[(2-hydroxy-1-naphthyl)azo]-3-methyl-1-phenyl- (8CI); 3H-Pyrazol-3-one,2,4-dihydro-4-[(2-hydroxy-1-naphthalenyl)azo]-5-methyl-2-phenyl- (9CI);Solochrome Red ERS (6CI)
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