1,2-Dichlorotetrafluoroethane

Chlorofluorocarbon changed changed 6-34842465 1,2-dichlorotetrafluoroethane.svg 1,2-dichloro-1,1,2,2-tetrafluoroethane-3D-vdW.png 1,2-Dichloro-1,1,2,2-tetrafluoroethane R-114, CFC-114, halon 242, cryofluorane, Freon 114, Genetron 114, Refrigerant 114 correct chemspider 6189 changed EBI 325436 changed FDA 6B5VVT93AR 76-14-2 correct CAS 200-937-7 6429 KI1101000 1958 1S/C2Cl2F4/c3-1(5,6)2(4,7)8 DDMOUSALMHHKOS-UHFFFAOYSA-N ClC(F)(F)C(F)(F)Cl C2Cl2F4 170.92 g/mol colorless gas faint, ether-like (high concentrations) 1.455 g/cm3 -94 3.5 0.01% 1.9 atm (21°C) Ozone depletor nonflammable TWA 1000 ppm (7000 mg/m3)0201 15000 ppm TWA 1000 ppm (7000 mg/m3) 720,000 ppm (rat, 30 min)700,000 ppm (mouse, 30 min)750,000 ppm (rabbit, 30 min)76142 Dichlorotetrafluoroethane 07 Warning 420 410+403 502 1,2-Dichlorotetrafluoroethane, or R-114, also known as cryofluorane (INN), is a chlorofluorocarbon (CFC) with the molecular formula ClF2CCF2Cl. Its primary use has been as a refrigerant. It is a non-flammable gas with a sweetish, chloroform-like odor with the critical point occurring at 145.6 °C and 3.26 MPa. When pressurized or cooled, it is a colorless liquid. It is listed on the Intergovernmental Panel on Climate Change's list of ozone depleting chemicals, and is classified as a Montreal Protocol Class I, group 1 ozone depleting substance.United States Environmental Protection Agency EPA Ozone-Depleting Substances 17 July 2015 https://www.epa.gov/ozone-layer-protection/ozone-depleting-substances 16 May 2021 Uses When used as a refrigerant, R-114 is classified as a medium pressure refrigerant. The U.S. Navy uses R-114 in its centrifugal chillers in preference to R-11 to avoid air and moisture leakage into the system. While the evaporator of an R-11 charged chiller runs at a vacuum during operation, R-114 yields approximately 0 psig operating pressure in the evaporator. Manufactured and sold R-114 was usually mixed with the non symmetrical isomer 1,1-dichlorotetrafluoroethane (CFC-114a), as separation of the two isomers is difficult.Laube Johannes C. Mohd Hanif Norfazrin Martinerie Patricia Gallacher Eileen Fraser Paul J. Langenfelds Ray Brenninkmeijer Carl A. M. Schwander Jakob Witrant Emmanuel Wang Jia-Lin Ou-Yang Chang-Feng Gooch Lauren J. Reeves Claire E. Sturges William T. Oram David E. Tropospheric observations of CFC-114 and CFC-114a with a focus on long-term trends and emissions Atmospheric Chemistry and Physics 9 December 2016 16 23 15347–15358 10.5194/acp-16-15347-2016 2016ACP....1615347L free thumb|300px|left|Mixing ratio of CFC-114 in air (black) between 1960 and 2014. Also levels of CFC-114a are in red. Dangers Aside from its immense environmental impacts, R114, like most chlorofluoroalkanes, forms phosgene gas when exposed to a naked flame.False Alarms: The Legacy of Phosgene Gas https://hvacrschool.com/phosgene-gas/ HVAC School 4 January 2021 9 May 2022 References External links Material Safety Data Sheet from Honeywell International Inc., dated 22 August 2007. CDC - NIOSH Pocket Guide to Chemical Hazards Category:Chlorofluorocarbons Category:Refrigerants Category:Greenhouse gases Category:GABAA receptor positive allosteric modulators Category:Ozone-depleting chemical substances Category:Chlorofluoroalkanes Category:Haloethanes