Labelled analogue of Indeno[1,2,3-cd]pyrene, a polycyclic aromatic hydrocarbon (PAH) and a known carcinogen. Indeno[ 1,2,3-cd]pyrene is listed as a priority pollutant by the Environmental Protection Agency (EPA). Indeno[1,2,3-cd]pyrene has been detected in automobile engine exhaust, charcoal broiled foods, ground water, river sediments as well as cigarette smoke condensate.