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.[3]
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.[4]
Mixing ratio of CFC-114 in air (black) between 1960 and 2014. Also levels of CFC-114a are in red.
Dangersedit
Aside from its immense environmental impacts, R114, like most chlorofluoroalkanes, forms phosgene gas when exposed to a naked flame.[5]
^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. (9 December 2016). "Tropospheric observations of CFC-114 and CFC-114a with a focus on long-term trends and emissions". Atmospheric Chemistry and Physics. 16 (23): 15347–15358. Bibcode:2016ACP....1615347L. doi:10.5194/acp-16-15347-2016.
^"False Alarms: The Legacy of Phosgene Gas". HVAC School. 4 January 2021. Retrieved 9 May 2022.
External linksedit
from Honeywell International Inc., dated 22 August 2007.
CDC - NIOSH Pocket Guide to Chemical Hazards
January 01, 1970
dichlorotetrafluoroethane, also, known, cryofluorane, chlorofluorocarbon, with, molecular, formula, clf2ccf2cl, primary, been, refrigerant, flammable, with, sweetish, chloroform, like, odor, with, critical, point, occurring, when, pressurized, cooled, colorles. 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 3 1 2 Dichlorotetrafluoroethane Names Preferred IUPAC name 1 2 Dichloro 1 1 2 2 tetrafluoroethane Other names R 114 CFC 114 halon 242 cryofluorane Freon 114 Genetron 114 Refrigerant 114 Identifiers CAS Number 76 14 2 Y 3D model JSmol Interactive image ChEMBL ChEMBL325436 N ChemSpider 6189 Y ECHA InfoCard 100 000 853 EC Number 200 937 7 PubChem CID 6429 RTECS number KI1101000 UNII 6B5VVT93AR N UN number 1958 CompTox Dashboard EPA DTXSID8026434 InChI InChI 1S C2Cl2F4 c3 1 5 6 2 4 7 8Key DDMOUSALMHHKOS UHFFFAOYSA N SMILES ClC F F C F F Cl Properties Chemical formula C2Cl2F4 Molar mass 170 92 g mol Appearance colorless gas 1 Odor faint ether like high concentrations 1 Density 1 455 g cm3 Melting point 94 C 137 F 179 K Boiling point 3 5 C 38 3 F 276 6 K Solubility in water 0 01 1 Vapor pressure 1 9 atm 21 C 1 Hazards Occupational safety and health OHS OSH Main hazards Ozone depletor GHS labelling Pictograms Signal word Warning Hazard statements H280 H420 Precautionary statements P410 P403 P502 Flash point nonflammable 1 Lethal dose or concentration LD LC LC50 median concentration 720 000 ppm rat 30 min 700 000 ppm mouse 30 min 750 000 ppm rabbit 30 min 2 NIOSH US health exposure limits PEL Permissible TWA 1000 ppm 7000 mg m3 1 REL Recommended TWA 1000 ppm 7000 mg m3 1 IDLH Immediate danger 15000 ppm 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa N verify what is Y N Infobox references 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 4 Mixing ratio of CFC 114 in air black between 1960 and 2014 Also levels of CFC 114a are in red Dangers editAside from its immense environmental impacts R114 like most chlorofluoroalkanes forms phosgene gas when exposed to a naked flame 5 References edit a b c d e f g h NIOSH Pocket Guide to Chemical Hazards 0201 National Institute for Occupational Safety and Health NIOSH Dichlorotetrafluoroethane Immediately Dangerous to Life or Health Concentrations IDLH National Institute for Occupational Safety and Health NIOSH United States Environmental Protection Agency 17 July 2015 Ozone Depleting Substances Retrieved 16 May 2021 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 9 December 2016 Tropospheric observations of CFC 114 and CFC 114a with a focus on long term trends and emissions Atmospheric Chemistry and Physics 16 23 15347 15358 Bibcode 2016ACP 1615347L doi 10 5194 acp 16 15347 2016 False Alarms The Legacy of Phosgene Gas HVAC School 4 January 2021 Retrieved 9 May 2022 External links editMaterial Safety Data Sheet from Honeywell International Inc dated 22 August 2007 CDC NIOSH Pocket Guide to Chemical Hazards Retrieved from https en wikipedia org w index php title 1 2 Dichlorotetrafluoroethane amp oldid 1214844330, wikipedia, wiki, book, books, library,
