R-22

Also known as Chlorodifluoromethane or difluoromonochloromethane, R-22 has been phased out under the Montreal Protocol in developed countries in 2020 due to its ozone depletion potential (ODP) and high global warming potential (GWP), and in developing countries this process will be completed by 2030.

However,  R-22 is still in use in many systems and requires strict monitoring due to its health&safety and environmental concerns.

From an ecological point of view, R22 is a gas with a high GWP of 1810 and an ODP of 0.055 .