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Glossary - Freon 113 Freon-113 - molecular formula CCl2FC-ClF2

Trichlorotrifluoroethane, also called 1,1,2-Trichloro-1,2,2-trifluoroethane or CFC-113, is a chlorofluorocarbon.  It has the formula Cl2FC-CClF2.

FC-113 is a very unreactive chlorofluorocarbon that will stay in the atmosphere for a great deal of time if it is released.  CFC-113 will stay in the atmosphere long enough that it will cycle out of the troposphere and into the stratosphere.

In the stratosphere, CFC-113 can be broken up by ultraviolet radiation, creating chlorine radicals, which can, in turn, react with ozone molecules to form molecular oxygen (O2), leading to the overall depletion of stratospheric ozone (the amount of CFC-113 in the atmosphere has stayed relatively stable, at about 80 parts per trillion, since the early 1990s).


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