Diethyl Carbonate, with molecular formula C5H10O3,is a fine solvent and textile auxiliary agent and widely used as ethylating, carbonating and carbonaylethoxylating reagents in organic synthesis and as solvents of nitro-cotton, cellulose ether, synthetic resin and natural resin. In the textileprinting and dying industry, diethyl carbonate could make dyeing uniformity and increase fading assistance against sunshine, as solvent of resin, it is a nice solvent of polyamide, polyacrylonitrile and diphenol resin and can improve feel of the textiles and anti-crease quality in the synthetic fiber industry, used as paint remover, used to prepare the electrolyte in the capacitor cells and lihium cells.