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Ethylene oxide, also called oxirane, is the organic compound with the formula C2H4O. It is a cyclic ether, which consists of an alkane with an oxygen atom bonded to two carbon atoms of the alkane, forming a ring. Ethylene oxide is a colourless flammable gas at room temperature, with a faintly sweet odour; it is the simplest epoxide: a three-membered ring consisting of one oxygen atom and two carbon atoms. [1,2]
