Used as a key reagent in organic synthesis, particularly in Wittig reactions, where it converts aldehydes and ketones into allylated alkenes. This transformation is valuable for constructing carbon-carbon double bonds in complex molecules, especially in the preparation of conjugated dienes and other unsaturated compounds. Commonly employed in pharmaceutical and fine chemical industries for building intermediate structures. Its stability and reactivity make it suitable for both laboratory-scale and larger-scale synthetic applications. Also used in the synthesis of natural products and functional materials requiring precise alkene placement.