5-Methyl-2-[3-(trifluoromethyl)phenyl]-4H-pyrazol-3-one

5-甲基-2-[3-(三氟甲基)苯基]-4H-吡唑-3-酮

Also known as: 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-[3-(trifluoromethyl)phenyl]-, 1-(3-Trifluoromethylphenyl)-3-methyl-2-pyrazolin-5-one, 3-Methyl-1-[3-(trifluoromethyl)phenyl]-4,5-dihydro-1H-pyrazol-5-one, 3-methyl-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-5(4H)-one, 5-Methyl-2-[3-(trifluoromethyl)phenyl]-2,4-dihydro-3H-pyrazol-3-one, 5-methyl-2-[3-(trifluoromethyl)phenyl]-4H-pyrazol-3-one

5-Methyl-2-[3-(trifluoromethyl)phenyl]-4H-pyrazol-3-one (CAS 321-05-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H9F3N2O and a molecular weight of 242.19700 g/mol. It is also known as 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-[3-(trifluoromethyl)phenyl]-, 1-(3-Trifluoromethylphenyl)-3-methyl-2-pyrazolin-5-one and 3-Methyl-1-[3-(trifluoromethyl)phenyl]-4,5-dihydro-1H-pyrazol-5-one. Key properties include a boiling point of 346.4ºC at 760mmHg, a density of 1.35g/cm3 and a flash point of 163.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

321-05-1

Jingsj CID

J-1117635-4

Molecular Formula

C₁₁H₉F₃N₂O

Chinese Name

5-甲基-2-[3-(三氟甲基)苯基]-4H-吡唑-3-酮

Molecular Weight

242.19700 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026