Used primarily as a plasticizer to increase flexibility and durability in plastics, especially in polyvinyl chloride (PVC) products. Commonly found in coatings, adhesives, printing inks, and celluloid resins. Also used in cosmetics, perfumes, and personal care products to help bind fragrance and improve product consistency. Occasionally used as a solvent or carrier for dyes and pesticides. Due to concerns over endocrine disruption, its use in consumer products is increasingly regulated.