DescriptionCircumstances of exposure and related occupations
Polycyclic aromatic hydrocarbons (PAHs) are substances formed during incomplete combustion of organic material.
The most widely investigated PAH is benzo[a]pyrene.


Industries where occupational exposure to benzo[a]pyrene has been measured and reported include:
  • coal liquefaction, coal gasification, coke production and coke ovens, coal-tar distillation, roofing and paving (involving coal-tar pitch);
  • wood impregnation/preservation with creosote;
  • aluminium production (highest levels of exposure);
  • carbon electrode manufacture;
  • chimney sweeping;
  • coal-fired power plants.