Furans

see 'Dioxins'

Furans

Polychlorinated dibenzofurans (PCDFs), often associated with dioxins (PCDDs), are not industrially produced as such but found as impurities in some heavy chlorinated chemicals and as by-products of combustion (from wastes, coal, petroleum products, wood....).
Found on http://www.eurochlor.org/mainglossary
No exact match found