Other Pigment & DyeChina Pyrazolone: 1- (2, 5-Dichloro-4-Sulfophenyl) -3-Methyl-5-Pyrazolone, Find details about China 1- (2 5-Dichloro-4-Sulfophenyl) -3-Methyl-5-Pyr, 1- Phenyl -3-Methyl-5-Pyrazolone from Pyrazolone: 1- (2, 5-Dichloro-4-Sulfophenyl) -3-Methyl-5-Pyrazolone