Heptachloronorbornene

Heptachloronorbornene is a very hydrophobic chemical intermediates

Heptachloronorbornene can be converted to hexachloronor-bornadiene which is an intermediate in the syntheses of the stable chlorinated cyclodiene insecticides such as aldrin and isodrin.

It has a very high tendency to bioaccumulate.

Therefore, it is not surprising that these compounds were identified as contaminants in edible fish from rivers in the USA.

Harald J. Geyer, Gerhard G. Rimkus, Irene Scheunert, Andreas Kaune, Karl-Werner Schramm, Antonius Kettrup, Maurice Zeeman, Derek C.G.Muir, Larry G. Hansen, Donald Mackay;Bioaccumulation and Occurrence of Endocrine-Disrupting Chemicals (EDCs), Persistent Organic Pollutants (POPs), and Other Organic Compounds in Fish and Other Organisms Including Humans. The Handbook of Environmental Chemistry,Vol. 2 Part J, Springer-Verlag Berlin Heidelberg 2000