Methyltin trichloride is primarily used as an intermediate in the production of organotin compounds, which have various industrial applications. It plays a key role in the synthesis of stabilizers for polyvinyl chloride (PVC) plastics, enhancing their thermal stability and durability. Additionally, it is utilized in the manufacturing of catalysts for chemical reactions, particularly in the production of polyurethanes and silicones. Its applications also extend to the creation of antifouling agents in marine paints, which prevent the growth of organisms on ship hulls.