R-22 is a type of refrigerant that was commonly used in air conditioning and refrigeration systems. It is also known by its chemical name, chlorodifluoromethane, or by its trade name, Freon. R-22 is a hydrochlorofluorocarbon (HCFC) compound, which means it contains hydrogen, chlorine, fluorine, and carbon atoms. R-22 is a potent greenhouse gas, and its use has been phased out in many countries due to its harmful effects on the environment. The United States banned the production and import of R-22 in 2020, and other countries have also implemented similar restrictions on the use of the refrigerant. R-22 is being replaced by more environmentally-friendly refrigerants, such as hydrofluoroolefin (HFO) compounds and hydrocarbons.
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