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, esterification, and nucleophilic substitution reactions due to its ability to enhance reaction rates and yields. Also serves as a mild base and buffering agent in various chemical processes. Its ionic nature makes it useful in solvent extraction and separation techniques. Additionally, it finds use in the preparation of pharmaceuticals and fine chemicals where controlled basicity and solubility are required.