Used primarily as a plasticizer to increase flexibility and durability in plastics, especially in polyvinyl chloride (PVC) products. Commonly found in adhesives, sealants, and printing inks due to its ability to improve workability and adhesion. Also used in coatings and varnishes to enhance film formation and flexibility. Has been used in the manufacture of cellulose plastics and as a solvent or carrier in fragrances and perfumes. Its use has declined in some consumer products due to health and environmental concerns.