3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one

3,4-二甲基-1-苯基-1H-吡唑-5(4H)-酮

Also known as: 1-Phenyl-3,4-dimethyl-5(4H)-pyrazolone, 1-Phenyl-3,4-dimethyl-2-pyrazolin-5-one, 2,4-Dihydro-4,5-dimethyl-2-phenyl-3H-pyrazol-3-one, 4,5-Dimethyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 4,5-Dimethyl-2-phenyl-4H-pyrazol-3-one, 3,4-Dimethyl-1-phenyl-2-pyrazolin-5-one

3,4-Dimethyl-1-phenyl-1H-pyrazol-5(4H)-one (CAS 17900-68-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H12N2O and a molecular weight of 188.22600 g/mol. It is also known as 1-Phenyl-3,4-dimethyl-5(4H)-pyrazolone, 1-Phenyl-3,4-dimethyl-2-pyrazolin-5-one and 2,4-Dihydro-4,5-dimethyl-2-phenyl-3H-pyrazol-3-one. Key properties include a boiling point of 334.5ºC at 760mmHg, a density of 1.15g/cm3 and a flash point of 156.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

17900-68-4

Jingsj CID

J-1517609-9

Molecular Formula

C₁₁H₁₂N₂O

Chinese Name

3,4-二甲基-1-苯基-1H-吡唑-5(4H)-酮

Molecular Weight

188.22600 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026