Properties of Diborane (B2H6)
Diborane is a chemical compound with the formula B2H6. It is a toxic, colorless, and pyrophoric (ignites spontaneously in air) gas. Diborane is used in various chemical reactions, particularly in organic synthesis and the production of semiconductor materials.
The following table provides a comprehensive list of diborane 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 | 27.67 g/mol |
| Density (25°C) | 1.131 kg/m3 |
| Dynamic Viscosity (25°C) | 7.85 µPa·s |
| Thermal Properties | Metric |
| Melting Point | -165.5 °C |
| Boiling Point | -92.5 °C |
| Thermal Conductivity (25°C) | 0.0244 W/m·K |
| Specific Heat Capacity (Cp) | 2098 J/kg·K |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 16.7 °C |
| Critical Pressure (Pc) | 4 MPa |
| Critical Density (ρc) | 166 kg/m3 |
| Hazardous Data | Metric |
| Autoignition Temperature | 38 °C |
| Lower Flammability Limit | 0.9% |
| Upper Flammability Limit | 98% |
| NFPA Rating (Health) | 4 |
| NFPA Rating (Fire) | 4 |
| NFPA Rating (Reactivity) | 3 |
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.