Primarily used as a phase transfer catalyst in organic synthesis, facilitating the transfer of reactants between immiscible phases, such as aqueous and organic layers. It enhances reaction rates and efficiency in various alkylation, oxidation, and polymerization processes. Additionally, it finds application in the preparation of ionic liquids, which are used as solvents or electrolytes in electrochemical devices. Its surfactant properties also make it suitable for use in emulsion stabilization and micelle formation in industrial formulations. High-purity grades are employed in analytical applications, such as ion chromatography.