2-Cyclopenten-1-one
Also known as: 2-Cyclopentenone, Cyclopent-2-en-1-one, 2-Cyclopenten-1-one, CPEO, NSC 73117
2-Cyclopenten-1-one (CAS 930-30-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H6O and a molecular weight of 82.10 g/mol. Key properties include a boiling point of 136.0±0.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 42.2±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 930-30-3
- Jingsj CID
- J-1975511-4
- Molecular Formula
- C5H6O
- Molecular Weight
- 82.10 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 136.0±0.0 °C at 760 mmHg |
|---|---|
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 42.2±0.0 °C |
| Exact Mass | 82.041862 |
| PSA | 17.07000 |
| LogP | -0.05 |
| Vapor Pressure | 7.5±0.2 mmHg at 25°C |
| Refractive Index | 1.492 |
| Additional Property | almost insoluble |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
Customs & Trade Information
| HS Code | 2914299000 |
|---|---|
| Summary | 2914299000. other cyclanic, cyclenic or cyclotherpenic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Cyclopenten-1-one?
The CAS number of 2-Cyclopenten-1-one is 930-30-3.
What are the molecular formula and molecular weight of 2-Cyclopenten-1-one?
2-Cyclopenten-1-one has molecular formula C5H6O and molecular weight 82.10 g/mol.
Is 2-Cyclopenten-1-one hazardous?
2-Cyclopenten-1-one has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour.
What are the upstream and downstream products of 2-Cyclopenten-1-one?
For 2-Cyclopenten-1-one, Downstream Products: 7-Methyl-1-indanone, 4-(Trifluoromethyl)benzhydrol, 1,3-Cyclopentanedione.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Cyclopenten-1-one (CAS 930-30-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1975511-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.