4-Bromo-1-butene
Also known as: Homoallyl bromide, 3-Butenyl bromide, 4-Bromobut-1-ene, 1-Bromo-3-butene, 4-Bromobutene, but-3-enyl bromide, Allylcarbinyl bromide
4-Bromo-1-butene (CAS 5162-44-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H7Br and a molecular weight of 135.002 g/mol. Key properties include a boiling point of 99.3±9.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 9.4±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H319 — Causes serious eye irritation and H334 — May cause allergy or asthma symptoms if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5162-44-7
- Jingsj CID
- J-45318-9
- Molecular Formula
- C4H7Br
- Molecular Weight
- 135.002 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 99.3±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 9.4±0.0 °C |
| Exact Mass | 133.973099 |
| LogP | 2.34 |
| Vapor Pressure | 44.3±0.2 mmHg at 25°C |
| Refractive Index | 1.458 |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H319 — Causes serious eye irritation
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2903399090 |
|---|---|
| Summary | 2903399090. brominated,fluorinated or iodinated derivatives of acyclic 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 4-Bromo-1-butene?
The CAS number of 4-Bromo-1-butene is 5162-44-7.
What are the molecular formula and molecular weight of 4-Bromo-1-butene?
4-Bromo-1-butene has molecular formula C4H7Br and molecular weight 135.002 g/mol.
Is 4-Bromo-1-butene hazardous?
4-Bromo-1-butene has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation; H334 — May cause allergy or asthma symptoms if inhaled.
What are the upstream and downstream products of 4-Bromo-1-butene?
For 4-Bromo-1-butene, Upstream Products: 4-Bromo-1-butyne, 3-Buten-1-ol, 1,4-Dibromobutane; Downstream Products: 1,7-Octadiene, 1,2,4-Tribromobutane, Methyl undecanoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Bromo-1-butene (CAS 5162-44-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45318-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.