Bis(4-bromophenyl)acetylene

Also known as: 1,2-bis(4-bromophenyl)ethyne, 4,4'-Dibromotolan, 4,4'-Dibromodiphenylacetylene, 1,2-bis(4-bromophenyl)acetylene, 1-bromo-4-[(4-bromophenyl)ethynyl]benzene, 4,4'-bis(bromophenyl)acetylene, Bis-(p-bromophenyl)acetylene, 1,1'-(1,2-Ethynediyl)bis(4-bromobenzene)

Bis(4-bromophenyl)acetylene (CAS 2789-89-1) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C14H8Br2 and a molecular weight of 336.021 g/mol. Key properties include a melting point of 182ºC, a boiling point of 383.6±27.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 217.2±23.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2789-89-1
Jingsj CID: J-1448011-6
Molecular Formula: C₁₄H₈Br₂
Molecular Weight: 336.021 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	182ºC
Boiling Point	383.6±27.0 °C at 760 mmHg
Density	1.7±0.1 g/cm3
Flash Point	217.2±23.0 °C
Exact Mass	333.899261
LogP	6.32
Vapor Pressure	0.0±0.8 mmHg at 25°C
Refractive Index	1.697

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 Bis(4-bromophenyl)acetylene?

The CAS number of Bis(4-bromophenyl)acetylene is 2789-89-1.

What are the molecular formula and molecular weight of Bis(4-bromophenyl)acetylene?

Bis(4-bromophenyl)acetylene has molecular formula C14H8Br2 and molecular weight 336.021 g/mol.

What are the upstream and downstream products of Bis(4-bromophenyl)acetylene?

For Bis(4-bromophenyl)acetylene, Upstream Products: 1-Bromo-4-iodobenzene, Trimethylsilylacetylene, bis(tri-n-butylstannyl)acetylene; Downstream Products: 4,4'-Dibromobenzil, 4,4,5,5-Tetramethyl-2-(4-{2-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]ethynyl}phenyl)-1,3,2-dioxaborolane, 2-(4-bromophenyl)-1,3-benzoxazole.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Bis(4-bromophenyl)acetylene (CAS 2789-89-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1448011-6 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.