Petrochemicals, also called petroleum distillates, are chemical products derived from petroleum. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as corn or sugar cane. Chemical obtained either directly from cracking (pyrolysis), or indirectly from chemical processing, of petroleum Oil or natural gas. Major petrochemicals are acetylene, benzene, ethane, ethylene, methane, propane, and hydrogen, from which hundreds of other chemicals are derived. These derivatives are used as elastomers, fibres, plasticizers, and solvents, and as feedstock for production of thousands of other products.