Chlorine azide reacts explosively with 1,3-butadiene, ethane, ethene, methane, propane, phosphorus, silver azide, and sodium. Ethylene glycol is produced from ethylene (ethene), via the intermediate ethylene oxide. The chief use of ethane is the production of ethene (ethylene) by steam cracking. Polyethylene is a polymer consisting of long chains of the monomer ethylene (IUPAC name ethene). Typical monomers are nonpolar ethene and propene. Chlorinated solvents such as trichloroethylene, break down into ethene and chloride. Polyethylene is created through polymerization of ethene. In this process, ethene (ethylene) is converted to ethanal (acetaldehyde) using water and air. The original Ruhrchemie process produced propanal from ethene and syngas using cobalt tetracarbonyl hydride. For example, aziridine reacts with NOCl to give ethene, nitrous oxide and hydrogen chloride. In this system, ethylene became "ethene". For example, ethene (CH) has a double bond between the carbons. E.g. 1-propanol is produced from propionaldehyde, produced from ethene and carbon monoxide. Overall, this process adds a molecule of water to a molecule of ethene. The name of CH=CH is therefore "ethENe".