Cyclopentyl bromide
Also known as: Bromocyclopentane, 1-Bromocyclopentane, 1-Bromopentamethylene, Cyclopentane, bromo-, Cyclopentylbromide, BROMOCYCLOPENTANE, STAB.
Cyclopentyl bromide (CAS 137-43-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H9Br and a molecular weight of 149.029 g/mol. Key properties include a melting point of 137-139ºC, a boiling point of 135.0±9.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 35.0±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.
- 137-43-9
- Jingsj CID
- J-18742-2
- Molecular Formula
- C5H9Br
- Molecular Weight
- 149.029 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 137-139ºC |
|---|---|
| Boiling Point | 135.0±9.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 35.0±0.0 °C |
| Exact Mass | 147.988754 |
| LogP | 2.64 |
| Vapor Pressure | 9.7±0.2 mmHg at 25°C |
| Refractive Index | 1.510 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
Customs & Trade Information
| HS Code | 2903890090 |
|---|---|
| Summary | 2903890090. halogenated derivatives of cyclanic, cyclenic or cyclotherpenic hydrocarbons. 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 Cyclopentyl bromide?
The CAS number of Cyclopentyl bromide is 137-43-9.
What are the molecular formula and molecular weight of Cyclopentyl bromide?
Cyclopentyl bromide has molecular formula C5H9Br and molecular weight 149.029 g/mol.
Is Cyclopentyl bromide hazardous?
Cyclopentyl bromide has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour.
What are the upstream and downstream products of Cyclopentyl bromide?
For Cyclopentyl bromide, Upstream Products: Cyclopentanol, Cyclopentane, Cyclopentadiene; Downstream Products: Cyclopentylmagnesium bromide, Cyclopentane, Cyclopentene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cyclopentyl bromide (CAS 137-43-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18742-2 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.