Tetraisopropyl pyrophosphoramide (Iso-OMPA) is a selective inhibitor of butyrylcholinesterase (BChE). It is primarily used in biochemical research to distinguish BChE from acetylcholinesterase (AChE) activity, study enzyme inhibition mechanisms, and investigate cholinesterase functions in nerve signaling and detoxification processes. While it has anticholinesterase properties and was explored as an insecticide for agricultural pests, it is not widely used in practice due to its high toxicity to mammals. Rigorous safety measures are required for handling to protect humans and the environment.