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) including R-410A, R-134a and R-1234yf.
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) InCluDing r-410A, r-134a anD r-1234Yf.