Used primarily as a plasticizer in plastics and polymers to increase flexibility and durability, especially in cellulose esters and nitrocellulose. Commonly found in coatings, adhesives, printing inks, and dye formulations due to its solvency and film-forming properties. Also used as a fixative in perfumes to prolong scent and as a carrier for fragrances. Has been used in insect repellent formulations, particularly against mosquitoes and biting flies. Occasionally used as a solvent or additive in pharmaceuticals and cosmetics. Its use has declined in some consumer products due to health and environmental concerns.