Insect repellent DEET N,N-Diethyl-meta-toluamide CAS 134-62-3
N,N-Diethyl-meta-toluamide, also called DEET or diethyltoluamide CAS 134-12-3, is the most common active ingredient in insect repellents. DEET is a slightly yellow oil intended to be applied to the skin or to clothing, and provides protection against mosquitoes, ticks, fleas, chiggers, leeches, and many biting insects.