GBL is a non-toxic transparent liquid in the shape of oil. It can be mixed with water and dissolved by ethanol, ether, benzene and acetone. It can dissolve many other organic and inorganic compound. Using GBL is very safe and convenient, because it is a liquid with high boiling, powerful solvency, good electrical and stability properties. GBL is an important organic synthetic raw material and a fine solvent. It is mainly used as synthetic pyrrolidone series products cyclopropylamine acetyl-r-butyrolactone, Besides these, GBL is also used as solvent for agricultural chemicals, polymer, dyestuff and printing. Using GBL as raw material, we can produced aromatic chemicals, medicinal intermediates and rust remover.