5-(Difluoromethyl)-1-methyl-1,2-dihydro-3H-pyrazol-3-one

5-(二氟甲基)-1-甲基-1,2-二氢-3H-吡唑-3-酮

Also known as: 5-Difluoromethyl-1-methyl-1H-pyrazol-3-ol, 5-(Difluoromethyl)-3-hydroxy-1-methylpyrazole, 5-Difluoromethyl-3-hydroxy-1-methylpyrazole, 3H-Pyrazol-3-one, 5-(difluoromethyl)-1,2-dihydro-1-methyl-

5-(Difluoromethyl)-1-methyl-1,2-dihydro-3H-pyrazol-3-one (CAS 121303-75-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H6F2N2O and a molecular weight of 148.111 g/mol. It is also known as 5-Difluoromethyl-1-methyl-1H-pyrazol-3-ol, 5-(Difluoromethyl)-3-hydroxy-1-methylpyrazole and 5-Difluoromethyl-3-hydroxy-1-methylpyrazole. Key properties include a boiling point of 264.5±35.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 113.8±25.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

121303-75-1

Jingsj CID

J-1044543-1

Molecular Formula

C₅H₆F₂N₂O

Chinese Name

5-(二氟甲基)-1-甲基-1,2-二氢-3H-吡唑-3-酮

Molecular Weight

148.111 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026