Gases that are contained in a receptacle at a pressure not less than 280 Pa at 20° C or as a refrigerated liquid. This endpoint covers four types of gases or gaseous mixtures to address the effects of sudden release of pressure or freezing which may lead to serious damage to people, property, or the environment independent of other hazards the gases may pose.
Gases are classified, according to their physical state when packaged, into one of four groups