"CFCs" redirects here. For other singular uses, see CFC (disambiguation).
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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 propane.
The most common example is dichlorodifluoromethane (R-12). R-12 is also commonly called Freon and was used as a refrigerant. Many CFCs have been widely used as refrigerants, propellants (in aerosol applications), gaseous fire suppression systems, and solvents. As a result of CFCs contributing to ozone depletion in the upper atmosphere, the manufacture of such compounds has been phased out under the Montreal Protocol, and they are being replaced with other products such as hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs)[1] including R-410A,R-134a and R-1234yf.[2][3][4]
^"Climate Change". The White House. 19 March 2021. Archived from the original on 19 March 2021. Retrieved 11 April 2022.
^Mironov, O. G. (1968). "Hydrocarbon pollution of the sea and its influence on marine organisms". Helgoländer Wissenschaftliche Meeresuntersuchungen. 17 (1–4): 335–339. Bibcode:1968HWM....17..335M. doi:10.1007/BF01611234.
^Darby, Megan (19 August 2014). "Ozone layer treaty could tackle super polluting HFCs". rtcc.org. Archived from the original on 19 August 2014. Retrieved 11 April 2022.
^"Hydrofluoroolefins". GAB Neumann GmbH. Retrieved 2023-12-12.
and 23 Related for: Chlorofluorocarbon information
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine...
so-called NOx radical cycles also deplete stratospheric ozone. Finally, chlorofluorocarbon molecules are photolysed in the stratosphere releasing chlorine atoms...
in a low-pressure chamber to create plasma. A common etch gas is chlorofluorocarbon, or more commonly known Freon. A high radio-frequency voltage between...
non-flammable, non-toxic chlorofluorocarbon gas, Freon (R-12). The name is a trademark name owned by DuPont (now Chemours) for any chlorofluorocarbon (CFC), hydrochlorofluorocarbon...
from the beginning. As an engineer for GM, Midgley also developed chlorofluorocarbons, which have now been banned due to their contribution to climate...
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event occurred in 2020. The depletion is caused by the emission of chlorofluorocarbons and halons into the atmosphere, which causes ozone to break down...
Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is a chlorofluorocarbon (CFC). It is a colorless, faintly ethereal, and sweetish-smelling...
be estimated from the molecular structure of a given substance. Chlorofluorocarbons have ODPs roughly equal to 1. Brominated substances have usually...
containing polychlorinated biphenyl (PCB) Fridges and freezers, due to chlorofluorocarbon (CFC), an ozone-depleting substance. As of 2012 revisions to the regulations...
from a factory Air Air quality index Atmospheric dispersion modeling Chlorofluorocarbon Combustion Exhaust gas Haze Global dimming Global distillation Indoor...
layer was being depleted by chemicals released by industry, mainly chlorofluorocarbons (CFCs). Concerns that increased UV radiation due to ozone depletion...
from a factory Air Air quality index Atmospheric dispersion modeling Chlorofluorocarbon Combustion Exhaust gas Haze Global dimming Global distillation Indoor...
and its scientists developed many chemicals, most notably Freon (chlorofluorocarbons), for the refrigerant industry. It also developed synthetic pigments...
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anticholinergic by another route. Previously Atrovent inhalers used chlorofluorocarbon (CFC) as a propellant and contained soy lecithin in the propellant...
these being commonly known by the trademark Freon), R-134a, and other chlorofluorocarbon or hydrofluorocarbon refrigerants in conventional stationary refrigeration...
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