A Review on Hexachloro-1,3-butadiene (HCBD): Sources, Occurrence, Toxicity and Transformation

Overlooked Highly Volatile Persistent Organic Pollutants in the Atmosphere

“…This is similar to or higher than the values of polycyclic aromatic hydrocarbons (PAHs), a well-known group of air toxics. HCBD concentrations in areas surrounding perchloroethylene production could range from micrograms to milligrams per cubic meter, exceeding its occupational exposure limit of 210 μg/m 3 . Abundant evidence shows that HCBD, HCB, and α-HCH are widespread in the Arctic.…”