4-Methyl-2-pyrazolin-5-one

4-甲基-2-吡唑啉-5-酮

Also known as: 3H-Pyrazol-3-one,2,4-dihydro-4-methyl-, 4-Methyl-1H-pyrazol-5(4H)-one, 2,4-Dihydro-4-methyl-3H-pyrazol-3-one, 4-Methyl-1,2-dihydro-3H-pyrazol-3-one, 4-methyl-1,4-dihydropyrazol-5-one, 4-Methyl-2,4-dihydro-3H-pyrazol-3-one, 2-Pyrazolin-5-one,4-methyl, 4-Methyl-pyrazolon-5, EINECS 236-346-6, MFCD00003093

4-Methyl-2-pyrazolin-5-one (CAS 13315-23-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H6N2O and a molecular weight of 98.10320 g/mol. It is also known as 3H-Pyrazol-3-one,2,4-dihydro-4-methyl-, 4-Methyl-1H-pyrazol-5(4H)-one and 2,4-Dihydro-4-methyl-3H-pyrazol-3-one. Key properties include a melting point of 230-232ºC (dec.)(lit.), a boiling point of 298.3ºC at 760 mmHg, a density of 1.107g/cm3 and a flash point of 134.2ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

13315-23-6

Jingsj CID

J-973702-8

Molecular Formula

C₄H₆N₂O

Chinese Name

4-甲基-2-吡唑啉-5-酮

Molecular Weight

98.10320 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026