Properties of Nitrogen (N2)
Nitrogen is a chemical element with the symbol N and atomic number 7. It is a colorless, odorless, and tasteless gas that makes up about 78% of Earth’s atmosphere. Nitrogen is an essential element for life, as it is a crucial component of amino acids, which form proteins, and it plays a vital role in various biological and industrial processes.
The following table provides a comprehensive list of nitrogen 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 | 28.013 g/mol |
| Density (0°C) | 1.25 kg/m3 |
| Dynamic Viscosity (25°C) | 17.9 µPa·s |
| Speed of Sound in Gas (27°C) | 353 m/s |
| Thermal Properties | Metric |
| Melting Point | -210 °C |
| Boiling Point | -195.8 °C |
| Thermal Conductivity (25°C) | 0.024 W/m·K |
| Specific Heat Capacity (Cp) | 1040 J/kg·K |
| Critical Constants | Metric |
| Critical Temperature (Tc) | -147 °C |
| Critical Pressure (Pc) | 3.4 MPa |
| Critical Density (ρc) | 314 kg/m3 |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 1.00058 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.000297 |
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.