Halotron I
{{Chembox
| ImageFile = Dichlorotrifluoroethane.png
| ImageSize =100px
| ImageFile1 = Tetrafluormethan.svg
| ImageSize1 =100px
| ImageCaption1 = Chemical structures of dichlorotrifluoroethane (top) and tetrafluormethane (bottom), the two major components of Halotron I
| Section7 = {{Chembox Hazards
| ExternalSDS = [http://www.halotron.com/pdf/Halotron1_SDS.pdf Halotron]
| GHSPictograms = {{GHS07}}{{GHS04}}
| NFPA-F = 0
| NFPA-H = 1
| NFPA-R = 1
| NFPA-S =
| NFPA_ref = {{Cite web|url=https://www.halotron.com/|title=Halotron|website=www.halotron.com|accessdate=24 April 2023}}
| LC50 = 3.2% (4 hrs, inhalation)
}}
}}
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,{{cite journal|last1=Hodnebrog|first1=Øivind|last2=Åmås|first2=Borgar|last3=Fuglestvedt|first3=Jan|last4=Marston|first4=George|last5=Myhre|first5=Gunnar|last6= Nielsen|first6=Claus Jørgen|last7=Sandstad|first7=Marit|last8=Shine|first8=Keith P.|last9=Wallington|first9=Tim J.|title=Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers|journal=Reviews of Geophysics|date=July 9, 2020|volume=58|issue=3}} Halotron I's GWP is considerably lower at 77, reflecting a 96% reduction in environmental impact.{{cite web
|url=https://www.fire.tc.faa.gov/2010Conference/files/Halon_Replacement_I/Boeing2BTPHandheld/CarloBTPupdatePres.pdf|access-date=24 April 2023
|website=fire.tc.faa.gov|title=Sixth Triennial International Fire & Cabin Safety Research Conference|year=2010}}
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.{{cite web|url=https://www.nist.gov/system/files/documents/el/fire_research/R0201336.pdf|title=R0201336.pdf|website=NIST.gov|access-date=December 23, 2017}} 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