1-(2-Chlorophenyl)-3-methyl-2-pyrazolin-5-one

1-(2-氯苯基)-3-甲基-5-吡唑啉酮

Also known as: 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, 1-(2-Chlorophenyl)-3-methyl-1H-pyrazol-5(4H)-one, 2-(2-chlorophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one, 1-(o-Chlorophenyl)-3-methyl-5-pyrazolone, 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone Hydrate, 3-Methyl-1-(2'-chlorophenyl)-5-pyrazolone, AKOS B028754, EINECS 238-623-7, MFCD00059717

1-(2-Chlorophenyl)-3-methyl-2-pyrazolin-5-one (CAS 14580-22-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H9ClN2O and a molecular weight of 208.64400 g/mol. It is also known as 1-(2-Chlorophenyl)-3-methyl-5-pyrazolone, 1-(2-Chlorophenyl)-3-methyl-1H-pyrazol-5(4H)-one and 2-(2-chlorophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one. Key properties include a melting point of 193-197 °C(lit.), a boiling point of 361.6ºC at 760 mmHg, a density of 1.32 g/cm3 and a flash point of 172.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

14580-22-4

Jingsj CID

J-1993361-2

Molecular Formula

C₁₀H₉ClN₂O

Chinese Name

1-(2-氯苯基)-3-甲基-5-吡唑啉酮

Molecular Weight

208.64400 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026