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Beginning in the 1950s, chlorofluorocarbons (CFCs) were used in Europe as refrigerants, propellants and cleaning agents. CFCs are manmade substances that are stable, non-flammable, odourless and tasteless. They are hydrocarbons whose hydrogen atoms have been completely replaced with the halogens fluorine and chlorine, or in some cases bromine. They have a very high ozone depletion potential (ODP = 1) and a high direct global warming potential (GWP = 4,680-10,720). CFCs have been banned in Europe.
Examples: R 11, R 12, R 13, R 113 |
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Characteristics
(R 12)| ODP | 1 | | GWP | 8,100 | | Freezing
point | -158
ºC | | Critical
temperature | 112.0
ºC | | Critical
pressure | 41.6
bar | | Vapor
pressure at 32 ºC | 7.87
bar |
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