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γ-butyrolactone, also known as 4 - hydroxybutyric acid lactone, is an important organic chemical raw materials and fine chemical intermediates, is a colorless liquid with a faint scent, the boiling point of about 204 ℃, higher solubility ; miscible with water, but soluble in methanol, ethanol, acetone, ether and benzene. Due to the characteristics of the molecular structure of γ-butyrolactone, and its response performance, high electrical conductivity of the liquid, good stability, transport and processing and utilization of safety. Many organic and inorganic compounds capable of dissolving the γ-butyrolactone, are often used as the organic solvent, the extractant and the absorbent. In particular γ-butyrolactone and electrolytic solubility, the lithium battery electrolyte and electrical connection, as the use of special solvent of high conductivity. γ-butyrolactone with high reactivity, can be prepared in many kinds of fine chemicals, such as piracetam, ciprofloxacin, vitamin K4, interferon high value-added products, but also can be used for extracting acid other important pharmaceutical raw materials, but also for the production of acetylbutyrolactone, cyclopropanamine, methionine and thiodibutyrate other fine chemical products.