Used as a key reagent in organic synthesis, particularly in the Wittig reaction, where it facilitates the formation of alkenes from aldehydes and ketones. This compound is valuable in the preparation of complex organic molecules, including pharmaceuticals and natural products. It is also employed in the synthesis of fine chemicals and intermediates, offering a versatile approach to creating carbon-carbon double bonds. Additionally, it finds use in polymer chemistry for modifying or creating specific polymer structures. Its role in generating phosphorus ylides makes it essential in various research and industrial applications.