Benzene is an organic substance with the CAS number 000071-43-2 and the molecular formula C6H6. Under normal temperature and pressure, it is a liquid with a gasoline-like odor. Benzene can be used to manufacture products in the following fields: chemicals, coatings, fillers, polymers, plastics, and gasoline additives. When used as a fuel, it has a calorific value of 42.50 MJ/kg and is a fossil fuel derived from catalytic reforming of crude oil.