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 esterification processes where it enhances reaction rates and yields under mild conditions. Also utilized in the preparation of quaternary ammonium compounds for antimicrobial agents and surfactants due to its stable cationic structure. Effective in liquid-liquid extraction and polymerization reactions as a catalyst or stabilizer.