| PropertyUnitsHydrogenMethanePropaneMethanolEthanolGasolineChemical Formula H2CH4C3H8CH3OHC2H5OHCxHy (x = 4 - 12)Molecular Weight [a, b] 2.0216.0444.132.0446.07100 - 105Density, NTP [3, a, c]kg/m鲁0.08380.6681.87791789751 lb/ft鲁0.005230.04170.11649.449.346.9Viscosity, NTP [3, a, b]g/cm-sec8.81 E-51.10 E-48.012 E-59.18 E-30.01190.0037 - 0.0044 lb/ft-sec5.92 E-67.41 E-65.384 E-66.17 E-47.99 E-42.486 E-4 - 2.957 E-4Normal Boiling Point [a, b]掳C-253-162-42.164.578.527 - 225 掳F-423-259-43.8148173.380 - 437Vapor specific gravity, NTP [3, a, d]air = 10.06960.5551.55N/AN/A3.66Flash Point [b, d]掳C |