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Physical Properties: CAS No. 107-21-1 Chinese name of the stick model of ethylene glycol EINECS No. 203-473-3 Login English name Ethylene glycol, Mono ethylene glycol, MEG, EG. English Synonyms: glycol, 1, 2-ethanediol. alias glycol molecular formula C2H6O2; structure: HOCH2CH2OH molecular weight 62.07 melting point -13.2 °C Boiling point: 197.85 °C density, relative density (water = 1) 1.1155 (20 °C); relative density (Air = 1) 2.14 colorless appearance and character , odorless, sweet, sticky liquid vapor pressure 6.21kPa/20 °C Flash point: 111.1 °C Viscosity: 25.66mPa.s (16 °C) Solubility of water / ethanol / acetone / acetic acid glycerol miscible pyridine, etc., , slightly soluble in ether, insoluble in petroleum hydrocarbons and oils. to understand the zinc chloride / sodium chloride / potassium carbonate / potassium chloride / potassium iodide / potassium hydroxide and other inorganic substances. Surface tension: 46.49 mN / m (20 °C) stability of the steady light: 118 °C chemical properties: Due to the low molecular weight, nature and lively, can take the esterification / etherification / Aging / Oxidation / acetal / dehydration reactions [Edit this section] system of law Direct hydration of ethylene oxide. Industrial-scale production of ethylene glycol for the present the only way. Ethylene oxide and water in the pressure (2.23MPa) and 190 200 °C condition, in a tubular reactor liquid phase hydration of ethylene glycol directly, while by-product of diethylene glycol, triethylene the second reduction glycol and ethylene glycol over condensation.