Ethylene oxide, a colorless, flammable gas, is produced by the direct oxidation of ethylene in the presence of a silver catalyst. Its special molecular structure allows it to easily participate in addition reactions, effortlessly polymerizing into larger compounds. Thus, it has a wide range of uses in the chemical industry. It is a key raw material in major industrial applications in the production of of chemicals and intermediates, among which include the following: ethylene glycols, ethoxylates, polyethylene glycols, ethylene glycol ethers, and ethanolamines. Standard phrasing on many ethoxylated products' SDS is "< 0.0005%". Given that EO is extremely volatile due to its bond angle strain (Ethylene oxide’s bond angles are about 60°, giving it a significant angular strain with the energy of 105 kJ/mol), how could any EO be left in the finished product? Especially in 3rd or 4th tier downstream products, it seems inconceivable than any EO would be left, thus rendering making such a statement as < 0.0005% on an SDS highly unnecessary, as that is well below de minimis levels.