Benzyl chloride solution is widely used as an alkylating agent in organic synthesis. It plays a key role in introducing benzyl groups into molecules, especially in the production of pharmaceuticals, dyes, and fragrances. It is commonly employed to protect hydroxyl and amino groups during multi-step syntheses due to the ease of benzyl group removal under mild conditions. In the pharmaceutical industry, it serves as an intermediate in the manufacture of drugs such as antihistamines and certain antibiotics. It is also used in the preparation of quaternary ammonium compounds, which have applications as disinfectants and surfactants. Due to its reactivity with nucleophiles, it is valuable in the synthesis of esters, ethers, and sulfonamides. Caution is required during handling because of its lachrymatory and corrosive properties.