Basic Hydrogen Properties Download the information in Excel format:  Properties Value Units Auto ignition temperature 500 °C   932 °F Boiling point (1 atm) -252.9 °C   -423.2 °F Density NTP  0.08375…
Contains a comparison of the amount of fuel necessary to provide the same energy unit based on the lower heating values.
Hydrogen Density at different temperatures and pressures
Hydrogen mass and volume conversion factors at common temperatures and pressures. Data from NIST.
Hydrogen Viscosity at different temperatures and pressures
Contains lower and higher heating values for hydrogen and various solid, liquid, and gaseous fuels.