Naphthalene (C10H8)

Other names

Naphthalene, naphthacene

CAS Number



  • belongs to the group of polycyclic aromatic hydrocarbons (PAHs)
  • belongs to the PAH group: list of the 16 priority PAHs defined by the United States Environmental Protection Agency
  • colourless solid
  • smells like tar

Main sources

  • Intermediate product for azo dyes, insecticides, stabilisers, pharmaceuticals, cosmetic additives, softeners
  • combustion of coal, mineral oil, wood
  • tobacco smoke
  • washed out from tar (frequently used to pave roads and cover roofs until the 1970s)

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 kg/year
  • Water          10 kg/year
  • Soil              10 kg/year


  • suspected carcinogenic effect
  • very toxic to aquatic organisms
  • irritates eyes, respiratory system and skin

    Further information

    Last modification 16.12.2016

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