| Color: | colorless |
| State at 25°C: | gas |
| Density (g/cm3): | 0.0018 |
| Hardness (Mohs): | no data |
| Melting Point (K): | 83.8 |
| Boiling Point (K): | 87.3 |
| Heat of Fusion (kJ/mol): | 1.18 |
| Heat of Vaporization (kJ/mol): | 6.43 |
| Heat of Atomization (kJ/mol): | no data |
| Therm. Conductivity (J/m sec K): | 0.01772 |
| Elec. Conductivity (1/mohm cm): | no data |
| Abundance, Solar System: | 5.004321374 |
| Abundance, Earth's Crust: | 1 |
| Pure Cost ($/100g): | 0.5 |
| Bulk Cost ($/100g): | no data |
| Source: | Air |