1,1-Dibromoethane
Also known as: ethylidene dibromide, ethylidene bromide, 1,1-dibromoethane (stabilized with copper chip)
1,1-Dibromoethane (CAS 557-91-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C2H4Br2 and a molecular weight of 187.861 g/mol. Key properties include a melting point of -63ºC, a boiling point of 104.7±8.0 °C at 760 mmHg, a density of 2.1±0.1 g/cm3 and a flash point of -11.2±17.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 557-91-5
- Jingsj CID
- J-1383266-1
- Molecular Formula
- C2H4Br2
- Molecular Weight
- 187.861 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -63ºC |
|---|---|
| Boiling Point | 104.7±8.0 °C at 760 mmHg |
| Density | 2.1±0.1 g/cm3 |
| Flash Point | -11.2±17.7 °C |
| Exact Mass | 185.867966 |
| LogP | 1.89 |
| Vapor Pressure | 35.4±0.2 mmHg at 25°C |
| Refractive Index | 1.518 |
Frequently Asked Questions
What is the CAS number of 1,1-Dibromoethane?
The CAS number of 1,1-Dibromoethane is 557-91-5.
What are the molecular formula and molecular weight of 1,1-Dibromoethane?
1,1-Dibromoethane has molecular formula C2H4Br2 and molecular weight 187.861 g/mol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,1-Dibromoethane (CAS 557-91-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1383266-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.