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Halotron I

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Halotron I

Chemical structures of dichlorotrifluoroethane (top) and tetrafluormethane (bottom), the two major components of Halotron I
Hazards
GHS labelling:
Pictograms GHS07: Exclamation markGHS04: Compressed Gas
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
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 , 100 kPa). Infobox references
Chemical compound

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

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, Halotron I's GWP is considerably lower at 77, reflecting a 96% reduction in environmental impact.

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. 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

References

  1. "Halotron". www.halotron.com. Retrieved 24 April 2023.
  2. Hodnebrog, Øivind; Åmås, Borgar; Fuglestvedt, Jan; Marston, George; Myhre, Gunnar; Nielsen, Claus Jørgen; Sandstad, Marit; Shine, Keith P.; Wallington, Tim J. (July 9, 2020). "Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers". Reviews of Geophysics. 58 (3).
  3. "Sixth Triennial International Fire & Cabin Safety Research Conference" (PDF). fire.tc.faa.gov. 2010. Retrieved 24 April 2023.
  4. "R0201336.pdf" (PDF). NIST.gov. Retrieved December 23, 2017.
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