Ethylbenzene is primarily used in the production of styrene, a key component in the manufacture of plastics, resins, and synthetic rubber. It serves as an intermediate in the chemical industry, contributing to the creation of materials like polystyrene, which is widely used in packaging, disposable utensils, and insulation. Additionally, ethylbenzene is utilized as a solvent in coatings, inks, and adhesives due to its ability to dissolve various substances effectively. It also plays a role in the formulation of certain paints and varnishes, enhancing their application properties. In the petroleum industry, it is sometimes blended into gasoline to improve octane ratings and combustion efficiency.