Dibenzo[a,i]pyrene

**Semantic type:** Hazardous or Poisonous Substance

**Definition:** An aromatic hydrocarbon that consists of six fused rings and is produced by the incomplete combustion of organic matter. Dibenzo[a,i]pyrene is primarily found in gasoline exhaust, tobacco smoke and coal tar. Dibenzo[a,i]pyrene is reasonably anticipated to be a human carcinogen. (NCI05)

**Synonyms:** - 1,2,7,8-Dibenzopyrene - 3,4,9,10-Dibenzpyrene - Benzo(rst)pentaphene - DB(a,i)P - DIBENZO(A,I)PYRENE