... mol 5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one Chemical Propertiesmp 126-128 °C(lit.)bp 287 ... 8(CAS DataBase Reference)NIST Chemistry Reference3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-phenyl-( ... 89-25-8)EPA Substance Registry System3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-phenyl- ... 8) 5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one Usage And SynthesisChemical PropertiesOff white to light yellow ...