3-Methyl-2-pyrrolidinone
3-甲基-2-吡咯烷酮
Also known as: (R,S)-3-Methyl-pyrrolidin-2-one, 2-Pyrrolidinone, 3-methyl-, 3-Methyl-2-pyrrolidone, 3-methylpyrrolidin-2-one, alpha-Methylbutyrolactam, alpha-Methylbutyrolactame
3-Methyl-2-pyrrolidinone (CAS 2555-05-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H9NO and a molecular weight of 99.131 g/mol. It is also known as (R,S)-3-Methyl-pyrrolidin-2-one, 2-Pyrrolidinone, 3-methyl- and 3-Methyl-2-pyrrolidone. Key properties include a melting point of 55ºC, a boiling point of 240.5±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 127.5±3.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2555-05-7
- Jingsj CID
- J-1408337-6
- Molecular Formula
- C5H9NO
- Chinese Name
- 3-甲基-2-吡咯烷酮
- Molecular Weight
- 99.131 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 55ºC |
|---|---|
| Boiling Point | 240.5±9.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 127.5±3.7 °C |
Frequently Asked Questions
What is the CAS number of 3-Methyl-2-pyrrolidinone?
The CAS number of 3-Methyl-2-pyrrolidinone is 2555-05-7.
What are the molecular formula and molecular weight of 3-Methyl-2-pyrrolidinone?
3-Methyl-2-pyrrolidinone has molecular formula C5H9NO and molecular weight 99.131 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methyl-2-pyrrolidinone (CAS 2555-05-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1408337-6 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.