Polychlorinated biphenyls (C12H10-xClx)

Other names


CAS Number



  • synthetically manufactured mixtures including 209 different individual substances (congeners): distinguished by the number and location of the chlorine atom on the two phenol rings
  • clear to yellowish liquid
  • practically insoluble in water
  • vary according to the quantity of chlorine

Main sources

  • condensers and transformers (insulation)
  • hydraulic oil
  • lacquers, resins, plastics, printing inks, adhesives
  • durable elastic joint sealing

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               0,1 kg/year
  • Water          0,1 kg/year
  • Soil              0,1 kg/year


  • ingestion of large quantities: acute skin discomfort (e.g. chloracne, skin pigmentation), liver, spleen and kidney damage and weakens the immune system
  • suspected carcinogenic effect
  • carcinogenic effect in animals
  • very slow decomposition in the environment
  • accumulates in the food chain
  • daily ingestion of small quantities with food
  • is one of the most important environmental pollutants, available everywhere in the environment

Further information

Last modification 16.12.2016

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