A colorless gas (C2H2), formed by the action of water on calcium carbide and other carbides, that has an explosive range of 2. 5 to 100 per-cent and an ignition temperature of 5810F, and is lighter than air
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}