Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases. It is particularly effective in alkylation and acylation processes. Also employed in the preparation of phosphonium salts, which are useful in Wittig reactions for synthesizing alkenes. Additionally, it serves as an intermediate in the production of specialty chemicals and polymers. Its application extends to the field of materials science, where it aids in the modification of surfaces for improved adhesion and compatibility.