Di-n-propyltin-dichloride is primarily used as an intermediate in the synthesis of organotin compounds, which are widely applied in various industrial processes. It plays a crucial role in the production of stabilizers for polyvinyl chloride (PVC), enhancing the material's thermal stability and durability. Additionally, it is utilized in the manufacture of catalysts for polyurethane foams and silicone rubbers, improving their performance and quality. The compound also finds applications in the creation of biocides and antifouling agents, which are essential in protecting marine structures and coatings from biological growth. Its versatility in chemical synthesis makes it valuable in the development of specialized materials and industrial products.