Used primarily as a plasticizer in polyvinyl chloride (PVC) and other polymers to improve flexibility, durability, and workability. Commonly found in wire and cable insulation, flooring, and industrial films where good electrical resistance and low-temperature performance are required. Also used in some sealants, adhesives, and coatings. Due to its low volatility and good extraction resistance, it serves well in applications requiring prolonged performance under moderate heat and stress. However, its use is declining in consumer products due to health and environmental concerns.