Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by improving solubility and reactivity. Commonly applied in alkylation, oxidation, and esterification processes. Also serves as a precursor in the preparation of ionic liquids, which are employed as green solvents in catalytic reactions and electrochemical applications. Its quaternary ammonium structure enhances ion-pair extraction, making it useful in separation techniques and analytical chemistry.