Tributylphosphine tetrafluoroborate is primarily used in organic synthesis as a versatile reagent, particularly in catalytic processes. It serves as a stabilizing agent for metal nanoparticles, enhancing their activity in various chemical reactions. This compound is also employed in the preparation of phosphonium salts, which are valuable intermediates in the synthesis of organic compounds. Additionally, it finds application in the development of ionic liquids, contributing to their unique properties for use in green chemistry and catalysis. Its role in facilitating efficient and selective transformations makes it a useful tool in advanced material synthesis and pharmaceutical manufacturing.