Oxygen, O2
Molecular weight g/mol: 31.999nbsp;
Purity: 99.9999%
CAS: 7782-44-7 EC: 200-941-9 UN: 1072 (Compressed); 1073 (Refrigerated liquid)
Typical Filling Pressure: 15 °C: 200 bar(a) 70 °F: 2,640 psi(g)
Characteristics: Colourless and odourless gas. Many materials burn in oxygen that do not normally burn in air. Reduces the flash-point temperature and increases the combustion speed.
| Liquid State | |
| Density at b.p. 1 atm kg/l: | 1.1420 |
| Density 20 °C kg/l: | |
| Vapor pressure 20 °C bar: | |
| Specific heat kJ/kg*K: | |
| Rel.Spec.wgt, air=1 (15 °C.1 bar): | 1.11 |
| Density 15 °C 1 atm kg/m3: | 1.35 |
| Gaseous state | |
| Specific heat (15 °C) kJ/kg* K: | 0.916 |
| Thermal conductivity µW/cm• K: | |
| Solubility in water at P=1 bar l/kg: | |
| Boiling point (1 atm) | |
| Temp. °C: | -183.0 |
| Heat of vaporization kJ/kg | 213.3 |
| Critical point | |
| Temp. °C: | -118.6 |
| Pressure bar: | 50.43 |
| Density kg/l: | 0.4360 |
| Flammability in air | |
| Lower limit % volume: | n.a. |
| Upper limit % volume: | n.a. |