Used as a plasticizer in polymers to enhance flexibility and durability, especially in polyvinyl chloride (PVC) products such as cables, flooring, and films. Commonly applied in adhesives, sealants, and printing inks to improve workability and adhesion. Also functions as a solvent and carrier in perfumes, cosmetics, and insect repellents due to its ability to dissolve and stabilize fragrances. Employed in laboratories as a reference standard or matrix in analytical testing for phthalate migration studies.