Cyclopentene oxide
Also known as: 1,2-Epoxycyclopentane, 6-Oxabicyclo[3.1.0]hexane, Cyclopentene epoxide, Epoxycyclopentane, 1,2-cyclopentane oxide
Cyclopentene oxide (CAS 285-67-6) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8O and a molecular weight of 84.116 g/mol. Key properties include a boiling point of 102.0±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 10.0±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 285-67-6
- Jingsj CID
- J-1088835-4
- Molecular Formula
- C5H8O
- Molecular Weight
- 84.116 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 102.0±0.0 °C at 760 mmHg |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 10.0±0.0 °C |
| Exact Mass | 84.057518 |
| PSA | 12.53000 |
| LogP | 0.68 |
| Vapor Pressure | 39.6±0.1 mmHg at 25°C |
| Refractive Index | 1.490 |
| Storage Conditions | 2-8°C |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Cyclopentene oxide?
The CAS number of Cyclopentene oxide is 285-67-6.
What are the molecular formula and molecular weight of Cyclopentene oxide?
Cyclopentene oxide has molecular formula C5H8O and molecular weight 84.116 g/mol.
Is Cyclopentene oxide hazardous?
Cyclopentene oxide has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Cyclopentene oxide?
For Cyclopentene oxide, Upstream Products: Cyclopentene, trans-1,2-Cyclopentanediol, tert-Butyl hydroperoxide; Downstream Products: 2-Cyclopenten-1-ol, trans-1,2-Cyclopentanediol, cis-Cyclopentane-1,2-diol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cyclopentene oxide (CAS 285-67-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1088835-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.