Cyclopenta[cd]pyren-4(3H)-one is a polycyclic aromatic hydrocarbon identified in combustion exhausts. Formed from cyclopenta[cd]pyrene under stimulated environmental conditions.Also, it is an intermediate used in the synthesis of Acepyrene (A130950), which is a novel constituent discovered that belongs to the pyrene class of the polycyclic aromatic hydrocarbons. Acepyrene occurs in a large variety of carbon black soots, in cigarette smoke and is the major representative of PAH in car engine exhaust gases.
