Methane (CH4)

CAS Number



  • simplest hydrocarbon
  • colourless and odourless gas

Main sources

  • cattle farming
  • waste disposal sites (microbial degradation of organic matter in the absence of air)

Thresholds for the reporting requirement of facilities in accordance with Annex 2 PRTRO

(Ordinance on the Register relating to Pollutant Release and the Transfer of Waste and of Pollutants in Waste Water)

  • Air               100,000 kg/year
  • Water           -
  • Soil               -


  • not toxic to humans and animals in normally occurring concentrations
  • contributes to ozone formation in the free troposphere
  • greenhouse gas (greenhouse potential 25 above that of carbon dioxide (CO2))

Status and changes

Further information

Last modification 04.07.2018

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