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 enhances the transfer of anions from the aqueous phase to the organic phase. This chemical is also employed in the synthesis of phosphonium salts, which are valuable intermediates in the production of various organic compounds. Additionally, it finds application in the preparation of ionic liquids and as a reagent in the Wittig reaction, enabling the formation of alkenes from aldehydes or ketones. Its role in polymerization processes and as a stabilizer in certain chemical reactions further highlights its versatility in industrial and laboratory settings.