| Section2 = | Section3 = | Section7 =,, | SPhrases =,, | FlashPt = -14 °C }} | Section8 = }} » "THF" redirects here. For other uses, see THF (disambiguation). Tetrahydrofuran, also known as THF, is a heterocyclic organic compound with the formula (CH2)4O). It is a colourless low-viscosity liquid with a smell similar to diethyl ether. It is one of the most polar ethers. THF is the fully hydrogenated analog of the aromatic compound furan. Solvent properties THF is an aprotic solvent with… (More on Thf)