1) A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F) A gass or mixture having in a container, an absolute pressure exceeding 104 psi at 54.4°C (130°F) regardless of the pressure at (21.1°C (70°F) A liquid having a vapour pressure exceeding 40 psi at 37.8°C (70°F) as determined by ASTM D-323-72.