Potassium hydrosulfide is an inorganic compound with the formula KSH. This colourless salt consists of the cation and the bisulfide anion . It is the product of the half-neutralization of hydrogen sulfide with potassium hydroxide. The compound is used in the synthesis of some organosulfur compounds.[1] Aqueous solutions of potassium sulfide consist of a mixture of potassium hydrosulfide and potassium hydroxide.
The structure of the potassium hydrosulfide resembles that of potassium chloride. Their structure is however complicated by the non-spherical symmetry of the anions, but these tumble rapidly in the solid.[2]
The addition of sulfur gives dipotassium pentasulfide.
It is prepared by neutralizing aqueous KOH with .[3]