C6H6, commonly known as benzene, is a colorless, flammable liquid with a sweet odor. It is an aromatic hydrocarbon, meaning it contains a ring of carbon atoms with alternating double bonds. Benzene is a fundamental building block in organic chemistry and is used in the production of various chemicals, including plastics, resins, and synthetic fibers. Benzene occurs naturally in crude oil and is also produced through industrial processes. Due to its toxicity and potential health risks, exposure to benzene should be minimized. It is classified as a carcinogen, which means it can increase the risk of cancer with prolonged exposure.