Bifenthrin or (2-methyl-1,1-biphenyl-3-y1)-methyl-3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cyclopropanecarboxylate (CAS number 82657-04-3) is a pyrethroid insecticide that affects the nervous system of insects. Products containing bifenthrin include Talstar, Capture, and Bifenthrine.

The United States Environmental Protection Agency (EPA) has classified bifenthrin as a class C carcinogen (possible human carcinogen). It is highly toxic to fish.

Pyrethroids