Tetrahydrofuran, also known as oxolane, 1,4-epoxybutane, is a heterocyclic organic compound with chemical formula C4H8O, belonging to ethers, is the complete hydrogenation product of furan, colorless and transparent liquid, soluble in water , ethanol, ether, acetone, benzene, etc., mainly used as solvents, chemical synthesis intermediates, analytical reagents.