Chlorobromomethane 2 (CBM) : Halon 1011; it is a vaporizing liquid chemical compound (Ch2C1Br) used primarily as an extinguishing agent on flammable liquids and electrical fires. See: Halon
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}