Coumaphos-oxon, the active metabolite of coumaphos, is primarily used as a potent insecticide and acaricide, particularly in the control of pests affecting livestock. It is highly effective against ectoparasites such as ticks, mites, and lice, which can infest cattle, sheep, and other animals. The compound is often applied in formulations like dips, sprays, or pour-on solutions to directly target and eliminate these parasites on the animal's skin or fur. Its use helps prevent the spread of diseases carried by these pests, improving animal health and productivity. However, due to its high toxicity, careful handling and adherence to safety guidelines are essential during application.