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, films, and molded plastic products. Provides good electrical insulation properties, making it suitable for industrial and automotive applications. Also used in some adhesives, sealants, and coatings where flexibility and resistance to environmental stress are required. Has limited use in consumer products due to regulatory restrictions related to health and environmental concerns.