Ethylene Carbonate ,with molecular structure is C3H4O3,is a kind of clear and transparent liquid , melting point of 37-39 ,flashing point 160 and boiling point243-244,can be mainly used as a electrolyte for rechargeable lithium battery ,or a fine solvent for polyacrylonitrile and polyvinyl chloride.Also, EC can be used as reeling liquid in cottoncracy , a solvent for removing acidic gases ,an additive for concrete ,a raw material for furazolidone,vesicant for plastics and stabilizer for compound oil.