2-Bromo-2-butene
Also known as: 1-Methyl-1-propenyl Bromide, 2-Bromo-2-butene, mixture of cis and trans, 2-Bromo-2-butene (stabilized with Copper chip), 2-Bromobut-2-ene, 3-Bromo-2-butene, trans-2-Bromo-2-butene
2-Bromo-2-butene (CAS 13294-71-8) 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 135.00200 g/mol. Key properties include a melting point of -115.07°C (estimate), a boiling point of 82-90ºC(740 torr), a density of 1.32 and a flash point of 1.1ºC. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 13294-71-8
- Jingsj CID
- J-17182-4
- Molecular Formula
- C4H7Br
- Molecular Weight
- 135.00200 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -115.07°C (estimate) |
|---|---|
| Boiling Point | 82-90ºC(740 torr) |
| Density | 1.32 |
| Flash Point | 1.1ºC |
| Exact Mass | 133.97300 |
| LogP | 2.30500 |
| Vapor Pressure | 55.2mmHg at 25°C |
| Refractive Index | n20/D 1.461(lit.) |
| Additional Property | Not miscible or difficult to mix in water (664 mg/L 25 EST). |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
Frequently Asked Questions
What is the CAS number of 2-Bromo-2-butene?
The CAS number of 2-Bromo-2-butene is 13294-71-8.
What are the molecular formula and molecular weight of 2-Bromo-2-butene?
2-Bromo-2-butene has molecular formula C4H7Br and molecular weight 135.00200 g/mol.
Is 2-Bromo-2-butene hazardous?
2-Bromo-2-butene has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour.
What are the upstream and downstream products of 2-Bromo-2-butene?
For 2-Bromo-2-butene, Upstream Products: 2,3-Dibromobutane, mixture of (±) and meso, 1,2-Dibromoethane, But-2-yne; Downstream Products: 2-Chloro-2-butene (mixture of cis and trans), But-2-yne, Tri-n-butyltin bromide.
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-Bromo-2-butene (CAS 13294-71-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-17182-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.