4-Trifluoroacetyl-3-methyl-1-phenyl-5-pyrazolone

4-三氟乙酰-3-甲基-1-苯基-5-吡唑啉酮

Also known as: 1-phenyl-3-methyl-4-trifluoroacetylpyrazol-5-one, 3-methyl-1-phenyl-4-trifluoroacetyl-2-pyrazolin-5-one, 3-methyl-1-phenyl-4-trifluoroacetyl-5-pyrazolone, 3-methyl-1-phenyl-4-trifluoroacetylpyrazol-5-one, 5-hydroxy-3-methyl-1-phenyl-4-trifluoroacetylpyrazole, 5-methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, 5-methyl-2-phenyl-4-(trifluoroacetyl)-2,4-dihydro-3H-pyrazol-3-one

4-Trifluoroacetyl-3-methyl-1-phenyl-5-pyrazolone (CAS 1691-93-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H9F3N2O2 and a molecular weight of 270.20700 g/mol. It is also known as 1-phenyl-3-methyl-4-trifluoroacetylpyrazol-5-one, 3-methyl-1-phenyl-4-trifluoroacetyl-2-pyrazolin-5-one and 3-methyl-1-phenyl-4-trifluoroacetyl-5-pyrazolone. Key properties include a melting point of 145-148 °C, a boiling point of 291.4ºC at 760 mmHg, a density of 1.397g/cm3 and a flash point of 130ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

1691-93-6

Jingsj CID

J-49958-5

Molecular Formula

C₁₂H₉F₃N₂O₂

Chinese Name

4-三氟乙酰-3-甲基-1-苯基-5-吡唑啉酮

Molecular Weight

270.20700 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026