Hydrogen [ Return towards Gas information ]
CAS Number: 1333-74-0
UN1049 (gas); UN1966 (liquid refrigerated)
Main properties :
| Molecular weight | 2.016 g/mol |
| Solid phase: | |
| • Melting point | -2590C |
| Liquid phase: | |
| • Density (1.013 bar at boiling point) | 70.973 kg/m3 |
| • Boiling point (1.013 bar) | -252.80C |
| • Latent heat of vaporisation (1.013 bar at boiling point) | 454.3 kJ/kg |
| Gaseous phase: | |
| • Density (1.013 bar at boiling point) | 1.312 kg/m3 |
| • Density (1.013 bar and 150C) | 0.085 kg/m3 |
| • Specific volume (1.013 bar and 210C) | 11.986 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) | 0.021 kJ/(mol.K) |
| • Thermal conductivity (1.013 bar and 00C) | 168.35 mW/(m.K) |
| Concentration in air | 0.00005 % |
| Autoignition temperature | 5600C |
Supply mode :
Hydrogen can be supplied in cylinder, in tube-trailers, by on-site generator or by pipeline.
Main applications :
| Metallurgy, foundry | ore direct-reduction process |
| Metal working | heat treatment of various metal |
| Chemistry | binding with other molecules; plastics manufacturing |
| Petrochemistry | desulphurisation of fuel-oil and other fuels, hydro-cracking, hydro-reforming |
| Laboratories | pure gas and mixtures for industrial and hospital analyses and quality control |
| Glass | flat and hallow glass treatment, surface polishing |
| Food & beverages | edible oil hydrogenation |
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