CH2CHC6H5

CH2CHC6H5 corresponds to styrene, also known as vinylbenzene or ethenylbenzene. Its molecular formula is C8H8, and the structure consists of a benzene ring substituted with a vinyl group (-CH=CH2), giving rise to a compound that behaves as an aromatic monomer.

Styrene is a colorless to pale-yellow liquid at room temperature and is highly flammable. It has a characteristic sweet, minty odor and is relatively volatile. In industry, styrene is handled as a reactive monomer and is typically stored with inhibitors to prevent premature polymerization.

The principal route to styrene production is the catalytic dehydrogenation of ethylbenzene, a process used at large chemical plants to supply monomer for polymer production. Purification steps remove impurities and stabilizers are added to maintain storage stability. Global markets for styrene serve primarily the plastics and rubber industries.

Major applications of styrene include the production of polystyrene and various copolymers, such as styrene-butadiene rubber, acrylonitrile-styrene-butadiene, and other resins used in packaging, insulation, consumer products, and automotive parts. As a monomer, styrene undergoes free-radical polymerization readily, which underpins its widespread use in polymer chemistry. Storage and transport require temperature and temperature- and inhibitor-controlled conditions to prevent runaway polymerization.

Safety and environmental considerations include its flammability and potential toxicity. Inhalation or dermal exposure can affect the nervous system and eyes; users rely on appropriate ventilation and protective equipment. Styrene is a volatile organic compound and is managed under occupational exposure limits to minimize health and environmental risks.