Used primarily as a starting material in the production of a wide range of chemicals, including styrene for polystyrene plastics, cumene for phenol and acetone, and cyclohexane for nylon. Found in the manufacture of detergents, pesticides, resins, and pharmaceuticals. Also present as a component in gasoline, contributing to fuel performance, though its concentration is regulated due to health concerns. Historically used as an industrial solvent, but this application has declined due to toxicity and carcinogenicity risks. Still plays a critical role in the petrochemical industry as a building block for synthetic materials used in textiles, rubber, and plastics.