1,5-Dimethyl-2-(p-tolyl)-1,2-dihydro-3H-pyrazol-3-one

2,3-二甲基-1-(4-甲基苯基)-3-吡唑啉-5-酮

Also known as: 4-Methylantipyrine, 4'-Methylphenazone, 1,2-Dihydro-1,5-dimethyl-2-(4-methylphenyl)-3H-pyrazol-3-one, 1,5-Dimethyl-2-(4-methylphenyl)pyrazol-3-one, 1,5-dimethyl-2-(p-tolyl)-1H-pyrazol-3(2H)-one, 2,3-Dimethyl-1-(4-methylphenyl)-3-pyrazolin-5-one

1,5-Dimethyl-2-(p-tolyl)-1,2-dihydro-3H-pyrazol-3-one (CAS 56430-08-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H14N2O and a molecular weight of 202.25200 g/mol. It is also known as 4-Methylantipyrine, 4'-Methylphenazone and 1,2-Dihydro-1,5-dimethyl-2-(4-methylphenyl)-3H-pyrazol-3-one. Key properties include a melting point of 130-137ºC, a boiling point of 313.8ºC at 760mmHg, a density of 1.129g/cm3 and a flash point of 131.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

56430-08-1

Jingsj CID

J-1161376-5

Molecular Formula

C₁₂H₁₄N₂O

Chinese Name

2,3-二甲基-1-(4-甲基苯基)-3-吡唑啉-5-酮

Molecular Weight

202.25200 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026