A colorless, odorless gas (C2H6) that is insoluble in water, relatively inactive chemically, and has a flash point of -221oF, an ignition temperature of 959oF, and a flammable range of 3 percent to 12. 5 percent
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}