Tetrasulfane (S<sub>4</sub>H<sub>2</sub>) is an inorganic chemical compound featuring a disulfide and two thiol groups.
Similar to other polysulfanes, it can be made by neutralizing the given polysulfane salt with an acid, such as HCl or H<sub>2</sub>SO<sub>4</sub>. Example given with HCl and Na<sub>2</sub>S<sub>4</sub>:
Same as other polysulfanes, tetrasulfane it is a yellowish, oily liquid. Its density is around 1.5 g/cm<sup>3</sup> (ñ0.1 g/cm<sup>3</sup>).