Ethylene oxide is a colourless gas at ambient temperature which condenses when cooled to a colourless, mobile liquid boiling at 10.4°C. It is miscible in all proportions with water, alcohol, ether and many organic solvents. The vapours of ethylene oxide are extremely flammable and are toxic if inhaled.
Synonyms for ethylene oxide are epoxyethane, dimethylene oxide, ethene oxide and oxirane.
Its Chemical Abstracts Service number is 75-21-8.
