Usually abbreviated from its systematic name as TCE, trichloroethylene is a halocarbon that is primarily used as an industrial solvent. TCE is a clear, sweet-smelling, non-flammable liquid that was once used as a volatile general anesthetic intended to replace the highly flammable and hepatotoxic ether. Unfortunately, it quickly became apparent that TCE was not significantly safer than ether due to the amount of time it took to induce an anesthetic state, its reactivity with soda lime in carbon dioxide absorbing systems, and its similarity to chloroform in terms of hepatotoxicity. It has been banned for use as an anesthetic since the 1970s. It is produced industrially from ethylene that has been chlorinated via ferric chloride catalyst, producing 1,2-dichloroethane. It is then heated to 400 degrees Celsius with additional chlorine, converting it to the finished TCE product. This particular purity grade of TCE is used in the manufacturing process of microprocessors as solvent for cleaning silicon wafers.