4-hydroxyantipyrine

4-羟基-1,5-二甲基-2-苯基-1,2-二氢-3H-吡唑-3-酮

Also known as: 1,2-dihydro-4-hydroxy-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one, 1,5-Dimethyl-2-phenyl-4-hydroxy-4-pyrazoline-3-one, 1-Phenyl-2,3-dimethyl-4-hydroxy-5-pyrazolone, 1-phenyl-2,3-dimethyl-4-hydroxy-pyrazoline-5-one, 2,3-Dihydro-4-hydroxy-1,5-dimethyl-2-phenyl-1H-pyrazol-3-one, 4-Hydroxy-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one, 4-Hydroxy-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one, 4-Hydroxy-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one, 4-hydroxy-1,5-dimethyl-2-phenyl-1,2-dihydro-3h-pyrazol-3-one, 4-hydroxy-1,5-dimethyl-2-phenyl-pyrazol-3-one, 4-hydroxy-1,5-dimethyl-2-phenylpyrazol-3-one, Antipyrine,4-hydroxy, MFCD00003143, NSC 174055, Prestwick_270, hydroxy-4 antipyrine

4-hydroxyantipyrine (CAS 1672-63-5) 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 1,2-dihydro-4-hydroxy-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one, 1,5-Dimethyl-2-phenyl-4-hydroxy-4-pyrazoline-3-one and 1-Phenyl-2,3-dimethyl-4-hydroxy-5-pyrazolone. Key properties include a melting point of 184-186ºC(lit.), a boiling point of 314.3ºC at 760mmHg, a density of 1.294g/cm3 and a flash point of 143.9ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

1672-63-5

Jingsj CID

J-40256-7

Molecular Formula

C₁₁H₁₂N₂O₂

Chinese Name

4-羟基-1,5-二甲基-2-苯基-1,2-二氢-3H-吡唑-3-酮

Molecular Weight

204.22500 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026