- Source: 1,2-Dichlorotetrafluoroethane
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.
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.
Dangers
Aside from its immense environmental impacts, R114, like most chlorofluoroalkanes, forms phosgene gas when exposed to a naked flame.
References
External links
Material Safety Data Sheet from Honeywell International Inc., dated 22 August 2007.
CDC - NIOSH Pocket Guide to Chemical Hazards
Kata Kunci Pencarian:
- 1,2-Dichlorotetrafluoroethane
- 1,1-Dichlorotetrafluoroethane
- Halon
- Dielectric gas
- C2Cl2F4
- Fluorochemical industry
- List of refrigerants
- IPCC Third Assessment Report
- Chlorofluorocarbon
- Immediately dangerous to life or health
