Classification of
Insecticides :
(i) OrganoChlorine (OCs) : These are chlorinated hydrocarbon cmpds. GCMS
DDT, Lindane (BHC),
Dieldrin, Endosulfan
• Of historical
interest mostly & due to their presence in soils and sediments.
• Problems with
toxicity, persistence &
biomagnification. All are
neurotoxins.
• Endosulfan remains in use, this cyclodiene causes fish kills. Freshwater limit: 3 ng / L
• It does have
lower mammalian toxicity.