Partial List of Chemicals Associated with Diesel Exhaust

The following list identifies chemicals commonly associated with exhaust emitted by diesel engines. Chemical names link to the corresponding entry in OSHA’s Occupational Chemical Database.

• Major Components
  • Carbon dioxide
  • Carbon monoxide
  • Nitrogen dioxide
  • Nitric oxide
  • Particulates not otherwise regulated
  • Sulfur dioxide
• Minor Components
  • Acrolein
  • Benzene [related topic page]
  • Formaldehyde [related topic page]
  • 4-Hydroxycoumarin
  • 3'-Hydroxyacetophenone
  • 2-Hydroxy-4-methoxyacetophenone
  • Menadione
  • 6-Methoxytetralone
  • 6-Methylcoumarin
  • 3-Methyl-2-cyclopentene-2-ol-one
  • Trimethylbenzene (mixed isomers)
  • Polynuclear aromatic hydrocarbons
    • Acenaphthene
    • Acenaphthylene
    • Anthracene
    • Benz[a]anthracene
    • Benzo[b]fluoranthene
    • Benzo[k]fluoranthene
    • Benzo[ghi]perylene
    • Benzo[a]pyrene
    • Benzo[e]pyrene
    • Crysene
    • Coal tar pitch volatiles [related topic page]
    • Coke oven emissions
    • Dibenz[a,h]anthracene
    • Fluoranthene
    • Fluorene
    • Indeno[1,2,3-cd]pyrene
    • Naphthalene
    • Phenanthrene
    • Pyrene