Benzyl dichlorophosphite is primarily used as a key intermediate in the synthesis of organophosphorus compounds. It plays a significant role in the production of flame retardants, which are essential in enhancing the fire resistance of materials such as plastics, textiles, and coatings. Additionally, it is utilized in the preparation of ligands for catalysis, particularly in organic synthesis and polymerization processes. It is also employed in the synthesis of pesticides and insecticides due to its reactivity with alcohols, amines, and other organic compounds, making it valuable in the development of specialized chemicals for industrial and agricultural applications. Handle with care as it is toxic and may cause irritation to skin and respiratory system.