N,N-Diethyl-2-phenylacetamide is widely used as an insect repellent, particularly effective against mosquitoes, ticks, and other biting insects. It is commonly applied to the skin or clothing to provide protection in outdoor settings, such as camping, hiking, or working in areas prone to insect activity. Its formulation is often found in lotions, sprays, and creams, offering long-lasting repellency without causing significant skin irritation. Additionally, it is used in agricultural practices to protect livestock from insect-borne diseases. Its efficacy and relatively low toxicity make it a preferred choice in both personal and commercial applications for insect control.