1,2-Dichloro-1,1-difluoroethane

1,2-Dichloro-1,1-difluoroethane

1,2-Dichloro-1,1-difluoroethane

Chemical compound

1,2-Dichloro-1,1-difluoroethane (also R-132b or HCFC-132b) is a haloalkane and a hydrochlorofluorocarbon. It is an intermediate during the production of HFC-134a.[2]: Figure 7-2  According to a 2022 report by the WMO and other agencies, it has an ODP of 0.038 and a 100-year GWP of 332.[2]: Table A-5  It has been detected in the atmosphere at concentrations of up to 0.17 parts per trillion, probably because of its use during the production of other chemicals. Most emissions seem to come from East Asia.[3]

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References

  1. [1]
    Partially halogenated chlorofluorocarbons (ethane derivatives), WHO, 1992. International Programme on Chemical Safety; published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organisation, and the World Health Organization. Series: Environmental Health Criteria, #139. ISBN 92-4-157139-X, ISSN 0250-863X. Accessed 2024-01-15.
  2. [2]
    Scientific Assessment of Ozone Depletion 2022, Ozone Research and Monitoring – GAW Report No. 278, World Meteorological Organization. Accessed 2024-01-15.
  3. [3]
    "Unexpected nascent atmospheric emissions of three ozone-depleting hydrochlorofluorocarbons", Martin K. Vollmer, et al., Proceedings of the National Academy of Sciences, 118, #5 (February 2, 2021), e2010914118, doi:10.1073/pnas.2010914118.


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