C2H4, commonly known as ethylene, is a colorless gas with a sweet odor. It is the simplest alkene, consisting of two carbon atoms and four hydrogen atoms. Ethylene plays a crucial role in the plant world, acting as a natural hormone that regulates growth, ripening, and aging in fruits and flowers. In addition to its biological significance, ethylene is an important industrial chemical. It is primarily used in the production of polyethylene, a widely used plastic. Ethylene is also involved in the manufacture of various chemicals, making it a key player in the global economy.