2-butyl-5-methyl-2,4-dihydro-3H-pyrazol-3-one

2-丁基-5-甲基-2,4-二氢-3H-吡唑-3-酮

Also known as: 1-butyl-3-methyl-4,5-dihydro-1H-pyrazol-5-one, 2-butyl-5-methyl-4H-pyrazol-3-one, 3H-Pyrazol-3-one, 2-butyl-2,4-dihydro-5-methyl-, 1-butyl-3-methyl-2-pyrazolin-5-one

2-butyl-5-methyl-2,4-dihydro-3H-pyrazol-3-one (CAS 65156-70-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H14N2O and a molecular weight of 154.21000 g/mol. It is also known as 1-butyl-3-methyl-4,5-dihydro-1H-pyrazol-5-one, 2-butyl-5-methyl-4H-pyrazol-3-one and 3H-Pyrazol-3-one, 2-butyl-2,4-dihydro-5-methyl-. Key properties include a boiling point of 215.2ºC at 760 mmHg, a density of 1.07g/cm3 and a flash point of 84ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

65156-70-9

Jingsj CID

J-1508226-4

Molecular Formula

C₈H₁₄N₂O

Chinese Name

2-丁基-5-甲基-2,4-二氢-3H-吡唑-3-酮

Molecular Weight

154.21000 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026