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 nucleophilic substitutions, esterifications, and polymerizations where mild basic conditions are required. Also serves as a source of acetate ions in controlled-release systems and in the preparation of quaternary ammonium-based ionic liquids. Its hygroscopic nature makes it useful in moisture-sensitive reactions when handled under anhydrous conditions.