Used as a plasticizer in polymers to improve flexibility and durability, especially in polyvinyl chloride (PVC) products like cables, flooring, and films. Commonly applied in adhesives, sealants, and printing inks for enhanced workability and adhesion. Also utilized in coatings and resins to improve flow and reduce brittleness. Found in some consumer products such as nail polishes and perfumes to extend fragrance and improve film formation. Historically used as a solvent and carrier in insect repellents and dye formulations.