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, automotive parts, flooring, and synthetic leather due to its good resistance to heat, UV light, and aging. Also used in sealants, adhesives, and coatings where long-term performance and low volatility are required. Its low migration rate makes it suitable for applications needing reduced leaching over time.