Properties of Bromine (Br2)
Bromine is a chemical element with the symbol Br and atomic number 35. It is a dark red-brown liquid at room temperature and is part of the halogen group in the periodic table. Bromine is known for its strong, unpleasant odor and is often used in flame retardants, photographic chemicals, and as a disinfectant.
The following table provides a comprehensive list of bromine properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Molar Mass | 159.808 g/mol |
| Density | 3119 kg/m3 |
| Dynamic Viscosity | 0.996 mPa·s |
| Surface Tension (25°C) | 40.9 mN/m |
| Thermal Properties | Metric |
| Melting Point | -7 °C |
| Boiling Point | 58.8 °C |
| Thermal Conductivity | 0.123 W/m·K |
| Vapor Pressure | 23.3 kPa |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 310 °C |
| Critical Pressure (Pc) | 10.3 MPa |
| Critical Molar Volume (Vc) | 127 cm3/mol |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 3.15 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.6083 |
| Hazardous Data | Metric |
| NFPA Rating (Health) | 3 |
| NFPA Rating (Fire) | 0 |
| NFPA Rating (Reactivity) | 0 |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)
Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.