1-Methyl-2-pyrrolidinone
Also known as: N-Methylpyrrolidone, N-Methyl-2-pyrrolidone, 1-Methyl-2-pyrrolidinone, 1-Methyl-2-pyrrolidone, 1-Methylpyrrolidin-2-one, N-Methyl-α-pyrrolidinone, Methylpyrrolidone, NMP
1-Methyl-2-pyrrolidinone (CAS 872-50-4) 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. Key properties include a melting point of −24 °C(lit.), a boiling point of 202.0±0.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 86.1±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 872-50-4
- Jingsj CID
- J-32545-9
- Molecular Formula
- C5H9NO
- 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 | −24 °C(lit.) |
|---|---|
| Boiling Point | 202.0±0.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 86.1±0.0 °C |
| Exact Mass | 99.068413 |
| PSA | 20.31000 |
| LogP | -0.40 |
| Additional Property | 3.4 (vs air) |
| Vapor Pressure | 0.3±0.4 mmHg at 25°C |
| Refractive Index | 1.470 |
| Additional Property | >=10 g/100 mL at 20 ºC |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Jing Wang, et al. Nitrate stimulation of N-Methylpyrrolidone biodegradation by Paracoccus pantotrophus: Metabolite mechanism and Genomic characterization. Bioresour Technol. 2019 Dec;294:122185. [2]. Claudia Julieta Solís-González, et al. Novel Metabolic Pathway for N-Methylpyrrolidone Degradation in Alicycliphilus sp. Strain BQ1. Appl Environ Microbiol. 2017 Dec 15;84(1):e02136-17. |
|---|
Customs & Trade Information
| HS Code | 2933790090 |
|---|---|
| Summary | 2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 1-Methyl-2-pyrrolidinone?
The CAS number of 1-Methyl-2-pyrrolidinone is 872-50-4.
What are the molecular formula and molecular weight of 1-Methyl-2-pyrrolidinone?
1-Methyl-2-pyrrolidinone has molecular formula C5H9NO and molecular weight 99.131 g/mol.
Is 1-Methyl-2-pyrrolidinone hazardous?
1-Methyl-2-pyrrolidinone has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 1-Methyl-2-pyrrolidinone?
For 1-Methyl-2-pyrrolidinone, Upstream Products: 1-Methylpyrrolidine, N-Methylsuccinimide, Maleic acid; Downstream Products: 4'-Methyl-[1,1'-biphenyl]-4-carbonitrile.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-Methyl-2-pyrrolidinone (CAS 872-50-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32545-9 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.