2-Chloro-1,1-difluoroethane (HCFC-142) is a haloalkane and a hydrochlorofluorocarbon. It is produced as a byproduct of the production of 1-chloro-1,1-difluoroethane (HCFC-142b). According to a 2022 report by the WMO and other agencies, it has an ODP of 0.019 and a 100-year GWP of 189.
References "Catalytic Pyrolysis of 2-Chloro-1,1-difluoroethane to Synthesize Vinylidene Fluoride over the Potassium-Promoted Carbon Catalysts", Juanjuan Yuan, Zhe Hong, Zhiwen Xi, Wenzhi Jia, Zhi Huang, Junhui Li, and Zhirong Zhu, ChemistrySelect 5, #19 (May 22, 2020), pp. 5788-5793, . Scientific Assessment of Ozone Depletion 2022, Ozone Research and Monitoring – GAW Report No. 278, World Meteorological Organization. Accessed 2024-01-13.