1,1,1-Trichloro-2,2,2-trifluoroethane
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Asymmetrical trichlorotrifluoroethane, also called 1,1,1-Trichloro-2,2,2-trifluoroethane or CFC-113a is a
chlorofluorocarbon Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and prop ...
(CFC). It has the formula .


Environmental effects

Ozone depletion A team of researchers at the
University of East Anglia The University of East Anglia (UEA) is a public research university in Norwich, England. Established in 1963 on a campus west of the city centre, the university has four faculties and 26 schools of study. The annual income of the institution f ...
analysed unpolluted air samples from Tasmania dating from the period 1978 to 2012. They concluded that the CFC's they studied had started entering the atmosphere from
anthropogenic Anthropogenic ("human" + "generating") is an adjective that may refer to: * Anthropogeny, the study of the origins of humanity Counterintuitively, anthropogenic may also refer to things that have been generated by humans, as follows: * Human im ...
sources in the 1960s and that while the abundance of certain CFCs had decreased, owing to the
Montreal Protocol The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion Ozone depletion consists of two related events observed sinc ...
, the abundance of CFC-113a in the atmosphere was still growing. Its source remained uncertain, but production of
hydrofluorocarbons Hydrofluorocarbons (HFCs) are man-made organic compounds that contain fluorine and hydrogen atoms, and are the most common type of organofluorine compounds. Most are gases at room temperature and pressure. They are frequently used in air conditi ...
in East Asia was suspected by some. Between 2012 and 2017, concentrations of the gas jumped by 40 percent.


See also

* 1,1,2-Trichloro-1,2,2-trifluoroethane


References

{{DEFAULTSORT:Trichloro-2, 2, 2-Trifluoroethane, 1, 1, 1- Chlorofluorocarbons Greenhouse gases Refrigerants Trifluoromethyl compounds Trichloromethyl compounds