Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases. It is particularly effective in nucleophilic substitution reactions, where it helps transfer anions from the aqueous phase to the organic phase. Additionally, it serves as a precursor for the preparation of Wittig reagents, which are essential in the formation of alkenes from carbonyl compounds. Its application extends to polymer chemistry, where it aids in the synthesis of functionalized polymers. The compound is also utilized in the development of ionic liquids, contributing to their unique properties for use in green chemistry and industrial processes.