Used primarily as an intermediate in organic synthesis, especially in the production of dyes, perfumes, and pharmaceuticals. It serves as a benzylating agent to introduce the benzyl group into molecules, facilitating the creation of esters and ethers in fine chemicals. Commonly employed in the manufacture of quaternary ammonium compounds for surfactants and disinfectants. Also utilized in polymer chemistry as a catalyst or modifier in resin and plastic production. Due to its reactivity with amines and alcohols, it plays a key role in the synthesis of active pharmaceutical ingredients and agrochemicals.