Dibenzo[a,h]pyrene

**Semantic type:** Hazardous or Poisonous Substance

**Definition:** A crystalline, aromatic hydrocarbon consisting of six fused rings and formed during the incomplete combustion of organic matter. Dibenzo[a,h]pyrene is primarily found in engine exhaust, cigarette tar and coal tar pitch. Dibenzo[a,h]pyrene is reasonably anticipated to be a human carcinogen. (NCI05)

**Synonyms:** - 1,2,6,7-Dibenzopyrene - DB(a,h)P - DIBENZO(A,H)PYRENE - Dibenzo(b,def)chrysene