Halotron I

Halotron I

Chemical structures of dichlorotrifluoroethane (top) and tetrafluormethane (bottom), the two major components of Halotron I
Hazards
GHS labelling:
Pictograms
NFPA 704 (fire diamond)	<imagemap> File:NFPA 704.svg|80px|alt=NFPA 704 four-colored diamond poly 150 150 300 300 150 450 0 300 Health 1: Exposure would cause irritation but only minor residual injury. E.g. turpentine poly 300 0 450 150 300 300 150 150 Flammability 0: Will not burn. E.g. water poly 450 150 600 300 450 450 300 300 Instability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calcium poly 300 300 450 450 300 600 150 450 Special hazards (white): no code desc none </imagemap> 1 0 1
Lethal dose or concentration (LD, LC):
LC50 (median concentration)	3.2% (4 hrs, inhalation)
Safety data sheet (SDS)	Halotron
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Halotron I is a fire extinguishing agent based on the raw material HCFC-123 (93%) mixed with tetrafluoromethane and argon as propellants.

Global emission concerns

It was originally introduced in 1992 to replace the severely ozone-depleting Halon 1211 (bromochlorodifluoromethane). Halon 1211 has a global warming potential of 2,070, whereas Halotron I's GWP is 77, a 96 percent reduction.

Performance

In December 2011, Halotron I was tested against "hidden fires", spurred by the effectiveness its predecessor demonstrated on an in-flight fire aboard a Delta L-1011 flight on March 17, 1991. The test was conducted at UL, and demonstrated similar effectiveness as Halon 1211, with significantly less human and global harm. Although the fire extinguishing effectiveness is similar, Halotron I requires a larger chemical volume to get the same ratings as Halon 1211.

DOT classification

UN1956, Compressed Gases, N.O.S., Nonflammable Gas. IMCO CLASS: 2.2