Cyclopentene
Also known as: 1-Cyclopentene, 3-cyclopentene, CYCLOPENTENE, STAB., CYCLOPENTENE,STAB., Cyclopcnten, Cyclopentanoneoxime, Cyclopenten, Cyclopentene [UN2246] [Flammable liquid], Cyclopentene, 98+%, Cyclopentene, ca 90%, tech, Cyclopentene, tech., Cyclopentene, tech., ca 90%, EINECS 205-532-9, MFCD00001394, cyclo-1-pentene, cyclopent-1-ene, cyclopentene, cyclopentenylidene
Cyclopentene (CAS 142-29-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8 and a molecular weight of 68.117 g/mol. Key properties include a melting point of −135 °C(lit.), a boiling point of 44.2±0.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of -44.9±10.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 142-29-0
- Jingsj CID
- J-18729-7
- Molecular Formula
- C5H8
- Molecular Weight
- 68.117 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −135 °C(lit.) |
|---|---|
| Boiling Point | 44.2±0.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | -44.9±10.3 °C |
| Exact Mass | 68.062599 |
| LogP | 2.33 |
| Vapor Pressure | 378.4±0.0 mmHg at 25°C |
| Refractive Index | 1.465 |
| Additional Property | immiscible |
Customs & Trade Information
| HS Code | 2902199090 |
|---|---|
| Summary | 2902199090 other cyclanes, cyclenes and cyclotherpenes。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Cyclopentene?
The CAS number of Cyclopentene is 142-29-0.
What are the molecular formula and molecular weight of Cyclopentene?
Cyclopentene has molecular formula C5H8 and molecular weight 68.117 g/mol.
What are the upstream and downstream products of Cyclopentene?
For Cyclopentene, Upstream Products: Cyclopentadiene, Tricyclo[5.2.1.02,6]deca-3,8-diene, Cyclopentane; Downstream Products: Isopropylcyclopentane, 1,2-cis-dimethylcyclohexane, trans-1,2-Dimethylcyclohexane.
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 (CAS 142-29-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18729-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.