4-Formylaminoantipyrine

4-甲酰氨基安替比林

Also known as: N-(2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)formamide, 4-Formamidoantipyrine, Metamizole EP impurity A, Metamizole impurity A, 4-Carboxamido-1,2-dihydro-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one, N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide, Formamide, N-(2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)-

4-Formylaminoantipyrine (CAS 1672-58-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C12H13N3O2 and a molecular weight of 231.251 g/mol. It is also known as N-(2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)formamide, 4-Formamidoantipyrine and Metamizole EP impurity A. Key properties include a melting point of 189-192ºC, a boiling point of 374.5±52.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 180.3±30.7 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

1672-58-8

Jingsj CID

J-1956366-6

Molecular Formula

C₁₂H₁₃N₃O₂

Chinese Name

4-甲酰氨基安替比林

Molecular Weight

231.251 g/mol

Category

Organic Compounds

Last updated

8/21/2026