This phosphonium salt is used as a reagent in organic synthesis, particularly in the Wittig reaction for forming alkenes from aldehydes or ketones. It serves as a precursor to generate ylides, which are key intermediates in this reaction, enabling the introduction of a 3-bromopropenyl group into molecules. It is also applied in the synthesis of complex organic compounds, such as pharmaceuticals and fine chemicals, where the bromopropyl functionality is desired. Its stability and reactivity make it valuable for developing new chemical entities and materials.