ChEBI: Chlorendic acid is a bridged organochlorine compound resulting from the Diels-Alder reaction of hexachlorocyclopentadiene with maleic anhydride followed by hydrolysis of the resulting anhydride. A chemical intermediate used in the preparation of fire-retardant polyester resins and plasticisers. It has a role as a carcinogenic agent. It is an organochlorine compound, a dicarboxylic acid and a bridged compound.