Also known as TBAF this reactant and catalyst is miscible with terahydrofuran, acetonitrile, dimethyl sulfoxide and water. Because it is flammable, formation of explosive air/vapor mixtures are possible, though the product is not self-igniting or explosive. Tetra-n-butylammonium Fluoride is a liquid with an ether-like odor and a clear light greenish to brown hue. It is hygroscopic, heat sensitive, and should be stored at ambient temperatures.