1. Properties: colorless and odorless odor.

2. Melting point (℃) : -183 (101.325kpa) [5]

3. Boiling point (℃) : -88.6 (101.325kpa)

4. Relative density (water =1) : 0.45 (0℃)

5. Relative vapor density (air =1) : 1.05

6. Saturated vapor pressure (kPa) : 3850 (20℃)

7. Heat of combustion (kJ/mol) : -1558.3

8. Critical temperature (℃) : 32.2

9. Critical pressure (MPa) : 4.87

10. Octanol/water partition coefficient: 1.81

11. Flash point (° C) : -135

12. Ignition temperature (℃) : 472

13. Explosion limit (%) : 12.5

14. Lower explosive limit (%) : 3.0

15. Solubility: insoluble in water, soluble in ethanol, ether, acetone, benzene.

16. Critical density (g·cm-3) : 0.0266

17. Critical volume (cm3·mol-1) : 145.5