Tetrahydrothiophene appears as a water-white liquid. About the same density as water and insoluble in water. Vapors heavier than air. Used as a solvent and to make other chemicals.
18 mm Hg ( 25 °C)
Relative vapour density (air = 1): 3.05
R11; R20/21/22; R36/38; R52/53
Used as odorant for fuel gas such as city gas, petroleum liquefied gas, natural liquefied gas, etc., as well as raw materials for medicine and pesticides.