The appearance of colorless gas, has the characteristic odor of ether
Melting point -141℃
Boiling point -29.5℃
Density (liquid) 0.666g/cm3
Density (gas) 1.97kg/m3
Saturated vapor pressure 533.2kPa (20℃)
Heat of combustion -1453kJ/mol
Critical temperature 127℃
Critical pressure 5.33MPa
Flash point -85.9 [14]
Octanol/water partition coefficient 0.10
Ignition temperature 350℃
Explosion limit (V/V) 27%
Lower explosive limit (V/V) 3.4%
Soluble in water, ethanol, ether
Refractive index (20ºC) 1.3018
Gas viscosity (20ºC) 85.1mPa·s
Melting heat 107.3kJ/kg
Heat of formation (gaseous state) -185.5kJ/mol
Critical compression factor 0.270
Eccentricity factor 0.204
Solubility parameter 17.572(J·cm-3)0.5
Gas phase standard heat of combustion (enthalpy) -1460.5kJ·mol-1
The gas phase standard claims heat (-184.1kJ·mol-1)
Gas phase standard entropy 267.34J·mol-1·K-1
Gas phase standard free energy of formation -112.9kJ·mol-1
Gas phase standard hot melt 65.57J·mol-1·K-1