Benzo(k)fluoranthene is primarily found in gasoline exhaust, cigarette smoke, coal tar, coal and oil combustion emissions, lubricating oils, used motor oils and crude oils. Synonyms for benzo(k)fluoranthene (BkF) include 8,9-benzfluoranthene, 8,9-benzofluoranthene, 1 1.12-benzofiuoranthene, 2,3,1,8-binaphthylene and dibenzo(bjk)fluorene. Its molecular weight is 252.32 and molecular formula C20H12. It is characterized by four benzene rings in various configurations containing only carbon and hydrogen atoms. It was absorbed through the skin, lungs, and gastrointestinal tract. In industrial processes it is considered to be environmental pollutants.