Pentachlorobenzene (C6HCl5)

CAS Number



  • colourless to white, needle-shaped crystals
  • flammable
  • pleasant smell
  • is a persistent organic pollutant

Main sources

  • waste management
  • industrial processes
  • intermediate product in the production of pentachloronitrobenzene (quintozene, a fungicide)
  • earlier: insulating liquid

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               1 kg/year
  • Water          1 kg/year
  • Soil              1 kg/year


  • toxic to humans and animals
  • potentially toxic to reproductive systems
  • very toxic to aquatic organisms
  • bioaccumulation


  • included on the list of banned substances by the Stockholm Convention in May 2009

Further information

Last modification 16.12.2016

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