Used primarily as a stabilizer in polyvinyl chloride (PVC) plastics, helping to prevent degradation from heat and ultraviolet light during processing and use. It is effective in maintaining the clarity and flexibility of PVC products over time. Commonly found in wire and cable insulation, flooring, and coated fabrics where long-term stability is required. Also serves as an intermediate in the synthesis of other organotin compounds used in industrial applications. Due to its toxicity and environmental persistence, its use is regulated in many regions.