1-(5-Amino-3-methyl-1H-pyrazol-4-yl)ethanone

1-(5-氨基-3-甲基-1H-吡唑-4-基)乙酮

Also known as: 1-(5-Amino-3-methyl-1H-pyrazol-4-yl)ethanone, 1-(3-Amino-5-methyl-1H-pyrazol-4-yl)ethanone, 4-acetyl-5-amino-3-methylpyrazole, 4-acetyl-3-amino-5-methylpyrazole, Ethanone, 1-(5-amino-3-methyl-1H-pyrazol-4-yl)-, Ethanone, 1-(3-amino-5-methyl-1H-pyrazol-4-yl)-

1-(5-Amino-3-methyl-1H-pyrazol-4-yl)ethanone (CAS 139111-42-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H9N3O and a molecular weight of 139.155 g/mol. It is also known as 1-(3-Amino-5-methyl-1H-pyrazol-4-yl)ethanone, 4-acetyl-5-amino-3-methylpyrazole and 4-acetyl-3-amino-5-methylpyrazole. Key properties include a boiling point of 356.9±37.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 169.7±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

139111-42-5

Jingsj CID

J-1508390-6

Molecular Formula

C₆H₉N₃O

Chinese Name

1-(5-氨基-3-甲基-1H-吡唑-4-基)乙酮

Molecular Weight

139.155 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026