Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases by improving reactivity and selectivity. Commonly applied in alkylation, oxidation, and esterification processes. Also serves as a precursor in the preparation of ionic liquids, which are employed as green solvents in industrial chemistry. Its bromide salt form enhances solubility in polar media, making it suitable for electrochemical applications and catalytic systems requiring ionic stability.