1,2-Dichlorotetrafluoroethane (original) (raw)
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A type of chlorofluorocarbon
1,2-Dichlorotetrafluoroethane
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| Names | |
| Preferred IUPAC name 1,2-Dichloro-1,1,2,2-tetrafluoroethane | |
| Other namesR-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 | 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 YN ?) Infobox references |
Chemical compound
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.
Aside from its immense environmental impacts, R114, like most chlorofluoroalkanes, forms phosgene gas when exposed to a naked flame.[5]
- ^ 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.
- Material Safety Data Sheet from Honeywell International Inc., dated 22 August 2007.
- CDC - NIOSH Pocket Guide to Chemical Hazards