ethylene oxide

Ethylene oxide, also identified by the IUPAC name oxirane, is a chemical compound with the formula C₂H₄O. It has a molecular mass of 44.026 and a canonical SMILES representation of C1CO1. The substance exhibits a density of 0.82 and a refractive index of 1.35965. Its physical properties include a melting point of -171 or -111.7, a boiling point of 51, and a vapor pressure of 1.46. The standard enthalpy of formation is -51.04, while the ionization energy is 10.57.

Safety data indicates a flash point of -20. The lower flammable limit is 3, and the upper flammable limit is 100. Exposure limits are defined by a time-weighted average of 1.8 and a ceiling limit of 9. The immediately dangerous to life or health concentration is 1440. The compound has an electric dipole moment of 1.89. In terms of molecular structure, it has zero hydrogen bond donors, one hydrogen bond acceptor, a topological polar surface area of 12.5, and an xlogp value of -0.1.