D.D.T. 2,2-bis (p-chlorophenyL) -1,1,1 trichloroethane


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It is synthesised by heating a mixture of chloral (1 mol) with chlorobenzene (2 mol) in the presence of concentrated HSO4.

DDT preparation from chloral

Properties and uses of D.D.T.

D.D.T. is almost insoluble in water but it is moderately soluble in polar solvents.

It is a powerful insecticide widely used for killing mosquitoes and other insects.

Effects of D.D.T

D.D.T. is not biodegradable. Its residues accumulate in environment and the long term effects could be highly dangerous. It has been proved to be toxic to living beings. Therefore, its use has been abandoned in many Western countries. However, inspite of its dangerous side effects, DDT is still being widely used in India due to non-availability of other cheaper insecticides.



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