1-Bromo-3-ethynylbenzene
Also known as: 3-Bromophenylacetylene, 3'-Bromophenyl acetylene, 1-Bromo-3-ethynyl-benzene, Benzene, 1-bromo-3-ethynyl-, 3-Bromophenylacetylene
1-Bromo-3-ethynylbenzene (CAS 766-81-4) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H5Br and a molecular weight of 181.029 g/mol. Key properties include a boiling point of 211.8±23.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 85.7±17.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 766-81-4
- Jingsj CID
- J-1011118-9
- Molecular Formula
- C8H5Br
- Molecular Weight
- 181.029 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 211.8±23.0 °C at 760 mmHg |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 85.7±17.0 °C |
| Exact Mass | 179.957458 |
| LogP | 3.17 |
| Vapor Pressure | 0.3±0.4 mmHg at 25°C |
| Refractive Index | 1.605 |
| Storage Conditions | 2-8°C |
Customs & Trade Information
| HS Code | 2903999090 |
|---|---|
| Summary | 2903999090 halogenated derivatives of aromatic hydrocarbons VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1-Bromo-3-ethynylbenzene?
The CAS number of 1-Bromo-3-ethynylbenzene is 766-81-4.
What are the molecular formula and molecular weight of 1-Bromo-3-ethynylbenzene?
1-Bromo-3-ethynylbenzene has molecular formula C8H5Br and molecular weight 181.029 g/mol.
What are the upstream and downstream products of 1-Bromo-3-ethynylbenzene?
For 1-Bromo-3-ethynylbenzene, Upstream Products: ((3-Bromophenyl)ethynyl)trimethylsilane, 1-Bromo-3-iodobenzene, Trimethylsilylacetylene; Downstream Products: 2-Bromo-1-(3-bromophenyl)ethanone, 3-[2-(3-bromophenyl)ethynyl]phenol, ((3-Bromophenyl)ethynyl)trimethylsilane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-Bromo-3-ethynylbenzene (CAS 766-81-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1011118-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.