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|Section2= |Section3= |Section7= |Section8= }} 1,1,1,2-tetrafluoroethane, R-134a, Forane 134a, Genetron 134a, Florasol 134a, Suva 134a or HFC-134a, also known as norflurane (INN), is a haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential. It has the formula CH2FCF3 and a boiling point of −26.3 °C (−15.34 °F) at atmospheric pressure. R-134a cylinders are colored light blue.〔()〕 Attempts at phasing out its use as a refrigerant with substances that have lower global warming potentials, such as HFO-1234yf are underway. == Uses == 1,1,1,2-Tetrafluoroethane is an inert gas used primarily as a "high-temperature" refrigerant for domestic refrigeration and automobile air conditioners. These devices began using 1,1,1,2-tetrafluoroethane in the early 1990s as a replacement for the more environmentally harmful R-12 and retrofit kits are available to convert units that were originally R-12-equipped. Other uses include plastic foam blowing, as a cleaning solvent, a propellant for the delivery of pharmaceuticals (e.g. bronchodilators), wine cork removers, gas dusters and in air driers for removing the moisture from compressed air. 1,1,1,2-Tetrafluoroethane has also been used to cool computers in some overclocking attempts. It is also commonly used as a propellant for airsoft airguns. The gas is often mixed with a silicon-based lubricant. 1,1,1,2-tetrafluoroethane is also being considered as an organic solvent suitable for extraction of flavor and fragrance compounds, as a possible alternative to other organic solvents and supercritical carbon dioxide. It can also be used as a solvent in organic chemistry, both in liquid and supercritical fluid. It is used in the resistive plate chamber particle detectors in the Large Hadron Collider.〔Anushree Ghosh (STUDY OF GLASS RESISTIVE PLATE CHAMBERS (RPC) AND CALCULATION OF EFFICIENCY ). INO Graduate Training Programme DHEP, TIFR, Mumbai.〕〔M. Capeans, I. Glushkov, R. Guida, F. Hahn, S. Haider (CERN, Switzerland) (RPC operation at the LHC experiments in an optimized closed loop gas system ). Medical Imaging Conference. 25–31 October 2009.〕 It is also used for other types of particle detectors, e.g. some cryogenic particle detectors. It can be used as an alternative to sulfur hexafluoride in magnesium smelting as a shielding gas.〔(Magnesium recycling in the United States in 1998 ). (PDF) . USGS. Retrieved on 2011-08-21.〕 1,1,1,2-tetrafluoroethane is also being considered as an alternative to sulfur hexafluoride as a dielectric gas.〔(Gaseous dielectrics with low global warming potentials – US Patent Application 20080135817 Description ). Patentstorm.us (2006-12-12). Retrieved on 2011-08-21.〕 Its arc-quenching properties are poor, but its dielectric properties are fairly good. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1,1,1,2-Tetrafluoroethane」の詳細全文を読む スポンサード リンク
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