Used as a plasticizer in the production of flexible polyvinyl chloride (PVC) products such as cables, flooring, hoses, and medical tubing. Enhances flexibility, durability, and workability of plastics. Commonly found in industrial and consumer goods where soft, pliable materials are required. Also used in some adhesives, sealants, and coatings to improve elasticity and resistance to temperature changes. Has been phased out in some applications due to health and environmental concerns, especially in children's toys and medical devices.