A colorless gas with the odor of natural gas; it has a flashpoint of -1560F, an ignition temperature of 8420F, and an explosive range of (2)2 to 9. 5 percent. See: Liquefied Petroleum Gas
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}