Chlorinated hydrocarbons

Hydrocarbons that contain chlorine. These include a class of persistent insecticides that accumulate in the aquatic food chain. Among them are DDT, aldrin, dieldrin, heptachlor, chlordane, lindane, endrin, Mirex, hexachloride, and toxaphene.


Source: Corrosion-Doctors.org

Wikipedia:  https://en.wikipedia.org/wiki/Organochloride