Halotron I

Halotron I is a fire extinguishing agent primarily composed of a raw material HCFC-123 (93%), mixed with tetrafluoromethane and argon serving as propellants.

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)	[1] 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

Global emission concerns

Halotron I was originally introduced in 1992 as a replacement for Halon 1211(bromochlorodifluoromethane), a substance known for its significant ozone-depleting properties. While Halon 1211 has a global warming potential (GWP) of 2,070,^[2] Halotron I's GWP is considerably lower at 77, reflecting a 96% reduction in environmental impact.^[3]

Performance

In December 2011, Halotron I underwent testing for "hidden fire" suppression, inspired by the demonstrated effectiveness of Halon 1211 in controlling an in-flight fire aboard a Delta L-1011 on March 17, 1991. The test was conducted at UL, and showed that Halotron I offered similar effectiveness as Halon 1211, but with significantly less harm to both humans and the environment.^[4] However, achieving the same fire suppression ratings require a higher volume of Halotron I compared to Halon 1211.

DOT classification

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