This Technical Report provides guidelines for the use of hydrogen in its gaseous and liquid forms as well as
its storage in either of these or other forms (hydrides). It identifies the basic safety concerns, hazards and
risks, and describes the properties of hydrogen that are relevant to safety. Detailed safety requirements
associated with specific hydrogen applications are treated in separate International Standards.
“Hydrogen” in this paper means normal hydrogen (1H2), not deuterium (2H2) or tritium (3H2).