Used as a phase transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Commonly applied in alkylation, oxidation, and nucleophilic substitution reactions where it enhances reaction rates and yields. Also employed in polymer chemistry to promote polymerization processes, especially in the preparation of functionalized polymers. Its quaternary ammonium structure makes it effective in stabilizing anionic intermediates and improving solubility of salts in nonpolar media.