Dibenz[a,h]acridine

Vehicle and diesel exhaust; coal tar, coke ovens, and aluminum production; wood/coal stoves; tobacco smoke; charred foods [1][2][3].

Breathing polluted air or smoke; skin contact with soot, coal‑tar products, or contaminated soil; eating heavily charred meats [2][3].

Lab studies show DNA damage and tumors; IARC has evaluated it for carcinogenicity, and PAH mixtures are linked to cancer in people [1][2][4].

Workers near coke ovens/coal‑tar pitch; smokers; people living near heavy traffic or industry; infants, children, and pregnant people may be more sensitive [2][3][4].

Don’t smoke; avoid secondhand smoke; ventilate and avoid charring food; limit time near fires/traffic; use workplace protections and wash off soot promptly [2][3][4].