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

5-(羟基甲基)-1-甲基-2-苯基-1H-吡唑-3(2H)-酮

Also known as: 3-Hydroxymethylantipyrine, 3-Hmap, 1-Methyl-2-phenyl-5-(hydroxymethyl)-4-pyrazoline-3-one, 2-Methyl-3-(hydroxymethyl)-1-phenyl-3-pyrazolin-5-one, 5-(Hydroxymethyl)-1-methyl-2-phenylpyrazol-3-one, 5-Hydroxymethyl-1-methyl-2-phenyl-1,2-dihydro-pyrazol-3-one, Sialyllactose Impurity 9

5-(Hydroxymethyl)-1-methyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one (CAS 18125-49-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H12N2O2 and a molecular weight of 204.22500 g/mol. It is also known as 3-Hydroxymethylantipyrine, 3-Hmap and 1-Methyl-2-phenyl-5-(hydroxymethyl)-4-pyrazoline-3-one. Key properties include a boiling point of 351.2ºC at 760mmHg, a density of 1.265g/cm3 and a flash point of 166.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

18125-49-0

Jingsj CID

J-1389902-2

Molecular Formula

C₁₁H₁₂N₂O₂

Chinese Name

5-(羟基甲基)-1-甲基-2-苯基-1H-吡唑-3(2H)-酮

Molecular Weight

204.22500 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026