1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one

1-乙酰基-4-甲基-1,5-二氢-2H-吡咯-2-酮

Also known as: 1-Acetyl-4-methyl-3-pyrrolin-2-one, 1-Acetyl-4-methyl-2-oxo-3-pyrroline, 1-acetyl-4-methyl-1,5-dihydro-pyrrol-2-one, 1-acetyl-4-methyl-5H-pyrrol-2-one, 1-Acetyl-4-methyl-2,5-dihydro-1H-pyrrol-2-one

1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one (CAS 34581-92-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C7H9NO2 and a molecular weight of 139.15200 g/mol. It is also known as 1-Acetyl-4-methyl-3-pyrrolin-2-one, 1-Acetyl-4-methyl-2-oxo-3-pyrroline and 1-acetyl-4-methyl-1,5-dihydro-pyrrol-2-one. Key properties include a melting point of 89ºC, a boiling point of 265.4ºC at 760mmHg, a density of 1.171g/cm3 and a flash point of 121.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
34581-92-5
Jingsj CID
J-998774-4
Molecular Formula
C7H9NO2
Chinese Name
1-乙酰基-4-甲基-1,5-二氢-2H-吡咯-2-酮
Molecular Weight
139.15200 g/mol
Category
Ketones
Last updated
8/21/2026

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Physicochemical Properties

Melting Point89ºC
Boiling Point265.4ºC at 760mmHg
Density1.171g/cm3
Flash Point121.4ºC

Frequently Asked Questions

What is the CAS number of 1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one?

The CAS number of 1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one is 34581-92-5.

What are the molecular formula and molecular weight of 1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one?

1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one has molecular formula C7H9NO2 and molecular weight 139.15200 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "1-Acetyl-1,5-dihydro-4-methyl-2H-pyrrol-2-one (CAS 34581-92-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-998774-4 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.