Used as a phase-transfer catalyst in organic synthesis, particularly in alkylation and esterification reactions. It facilitates the reaction between reagents in different phases by transferring ions into organic solvents, improving reaction rates and yields. Also applied in the preparation of fine chemicals and pharmaceutical intermediates where mild and selective catalytic conditions are required. Its quaternary ammonium structure enhances solubility and stability in various solvent systems, making it suitable for industrial-scale processes.