N,N-diethyl-meta-toluamide as an active ingredient for insect repellents was discovered by the US army in 1946. Since 1957 it is used by the public, implying a track record of over 50 years of public use. Throughout these 50 years a broad variety of test protocols have come and gone. Of course different opinions are related to different tests and scientist. Today deet is still one of the most commonly used actives for insect repellents and repels a broad range of insects and arachnids: mosquitoes, ticks, biting flies, midges, chiggers, fleas,…. However it is advised to pay attention, as not all materials are compatible with deet, so spray yourself and not your tent.
The Competent Authority Report of DEET can be found by following this link.
