Nitrogen [ Return towards Gas information ]
CAS Number: 7727-37-9
UN1066 (gas); UN1977 (liquid refrigerated)
Main properties :
| Molecular weight | 28.0134 g/mol |
| Solid phase: | |
| • Melting point | -2100C |
| Liquid phase: | |
| • Density (1.013 bar at boiling point) | 808.607 kg/m3 |
| • Boiling point (1.013 bar) | -195.90C |
| • Latent heat of vaporisation (1.013 bar at boiling point) | 198.38 kJ/kg |
| Gaseous phase: | |
| • Density (1.013 bar at boiling point) | 4.614 kg/m3 |
| • Density (1.013 bar and 150C) | 1.185 kg/m3 |
| • Specific volume (1.013 bar and 210C) | 0.862 m3/kg |
| • Heat capacity at constant pressure (1 bar and 150C) | 0.029 kJ/(mol.K) |
| • Heat capacity at constant volume (1 bar and 150C) | 0.02 kJ/(mol.K) |
| • Thermal conductivity (1.013 bar and 00C) | 24 mW/(m.K) |
| Concentration in air | 78.08 % |
Supply mode :
Nitrogen can be supplied in cylinder, liquefied gas tank, by on-site generator or by pipeline.
Main applications :
| Metallurgy, foundry | heat treatment of liquid metal, protective atmospheres and shields, pneumatic transportation of powdered charcoal |
| Metal working | heat treatment of various metal |
| Chemistry | protective atmosphere for products and installations |
| Petrochemistry | protective atmosphere for products and installations |
| Laboratories | pure gas and mixtures for industrial and hospital analyses and quality control |
| Glass | protective atmospheres, flat glass treatment |
| Healthcare | low temperatures preservation of living tissues and cells |
| Food & beverages | fast freezing, chilling, preservation and protection of foodstuff |
| Others | tires filling; fire protection of mine excavations |
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