Widely used as a plasticizer in polyvinyl chloride (PVC) products to improve flexibility and durability. Commonly found in cables, hoses, flooring, and medical tubing. Also used in sealants, adhesives, and coatings for industrial applications. Has been used in some cosmetics and personal care products, though this is declining due to health concerns. Its use is restricted in children's toys and childcare articles in many countries because of potential endocrine-disrupting effects.