Used as a key reagent in organic synthesis, particularly in Wittig-type reactions where it facilitates the formation of α,β-unsaturated carbonyl compounds. It acts as a phosphorus ylide that reacts with aldehydes and ketones to produce vinyl ketones, which are valuable intermediates in the synthesis of complex molecules such as natural products, pharmaceuticals, and functional materials. Its ability to introduce conjugated enone systems makes it useful in the development of bioactive compounds and in materials science for constructing conjugated systems with specific electronic properties.