Tetrahydrofuran THF is known as universal solvent because it has strong solvency. It is good solvent to polyethylene, polypropylene and fluorine resin, and other organic compounds, especially polyvinyl chloride, polyvinylidene chloride etc. It is colorless and transparent volatile liquid, similar to the smell of ether. Soluble in water, ethanol, ethyl ether, acetone, benzene, most organic solvents. Combustible. In the air can generate explosive peroxide.