Oxygen O2
Oxygen: Liquid oxygen has a density of 1.141 g/cm3 (1.141 kg/L) and is cryogenic with a freezing point of 50.5 K (−368.77 °F; −222.65 °C) and a boiling point of 90.19 K (−297.33 °F, −182.96 °C) at 101.325 kPa (760 mmHg). Liquid oxygen has an expansion ratio of 1:861 at 20 °C (68 °F); and because of this, it is used in some commercial and military aircraft as a source of breathing oxygen. In commerce, liquid oxygen is classified as an industrial gas and is widely used for industrial and medical purposes. Liquid oxygen is obtained from the oxygen found naturally in air by fractional distillation in a cryogenic air separation plant.
:
- Supports combution
- Oxidising
- Non-toxic
- Odourless
- Colourless
| Gas quality | Impurities | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N4.5 99.995% |
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| ULTRA N5.0 99.999% |
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| PLUS N5.5 99.9995% |
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| Chemical formula | : | O2 |
| Molecular weight | : | 32.0 g/mol |
| Boiling point at 1.013 bar | : | -183.0 0C |
| Gas density, absolute | : | 1.35 kg/m3 (15 0C, 1.013 bar) |
| Gas density, relative air | : | 1.1 |
| Cylinder connection | : | BS Standard or CGA on request |
| Cylinder colour | : | Blue |
