Chemical 2 : (1) Any substance used in or obtained by a chemical process. (2) Referring to an extinguisher or other fire fighting equipment that employs an agent other than plain water for fire extinguishment
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}