Ethylbenzene is a colorless, flammable liquid with a sweet odor, primarily used in the production of styrene, which is a key ingredient in making plastics and synthetic rubber. It is derived from petroleum and is commonly found in products like paints, varnishes, and adhesives. Ethylbenzene is produced through the alkylation of benzene with ethylene. While it is essential in industrial applications, exposure to high levels can be harmful, leading to health issues such as respiratory problems and headaches. Proper safety measures are important when handling this chemical.