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1,2-Dibromoethylene (cis- and trans- mixture)

Also known as: Acetylene Dibromide, 1,2-Dibromoethene, 1,2-Dibromoethylene (cis+trans), 1,2-dibromoethylene (mixture of cis and trans)

1,2-Dibromoethylene (cis- and trans- mixture) (CAS 540-49-8) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C2H2Br2 and a molecular weight of 185.84500 g/mol. Key properties include a boiling point of 107-110 °C(lit.) and a density of 2.27 g/mL at 20 °C(lit.). It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
540-49-8
Jingsj CID
J-1993206-0
Molecular Formula
C2H2Br2
Molecular Weight
185.84500 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point107-110 °C(lit.)
Density2.27 g/mL at 20 °C(lit.)
Exact Mass183.85200
LogP2.24740
Refractive Indexn20/D 1.542

GHS Safety & Compliance

Acute ToxicitySignal word: Danger
  • H301 — Toxic if swallowed
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2903399090
Summary2903399090. 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 1,2-Dibromoethylene (cis- and trans- mixture)?

The CAS number of 1,2-Dibromoethylene (cis- and trans- mixture) is 540-49-8.

What are the molecular formula and molecular weight of 1,2-Dibromoethylene (cis- and trans- mixture)?

1,2-Dibromoethylene (cis- and trans- mixture) has molecular formula C2H2Br2 and molecular weight 185.84500 g/mol.

Is 1,2-Dibromoethylene (cis- and trans- mixture) hazardous?

1,2-Dibromoethylene (cis- and trans- mixture) has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

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

Last updated:

How to cite: Jingsj. "1,2-Dibromoethylene (cis- and trans- mixture) (CAS 540-49-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993206-0 (accessed 2026-11-06).

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