3-phenoxybenzyl (1RS)-cis,trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate. 

Permethrin is a synthetic pyrethroid non-systemic insecticide with contact and stomach action, having a slight repellent property. It is also used for insect control in animal houses and in public health, for ectoparasite control on animals and as a wool preservative.

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