This term includes any material or mixture having in the container an absolute pressure exceeding 40 p.s.i. at 70 °F.; or regardless of the pressure at 70 °F., having an absolute pressure exceeding 104 p.s.i. at 130 °F.; or any liquid flammable material having a vapor pressure exceeding 40 p.s.i. absolute at 100 °F. as determined by the Reid method covered by the American Society for Testing Materials Method of Test for Vapor Pressure of Petroleum Products (D-323). Compressed gases are discussed in more detail in 49 CFR parts 171-179.

[CGFR 67-83, 33 FR 1113, Jan. 27, 1968, as amended by CGD 86-033, 53 FR 36026, Sept. 16, 1988]