|Jmol-3D images||Image 1|
|Molar mass||72.171 g/mol|
|Melting point||455 °C (851 °F; 728 K)|
|Solubility in water||good|
|EU Index||Not listed|
|Main hazards||Flammable solid, stench, releases hydrogen sulfide|
|Other anions||Potassium hydroxide|
|Other cations||Sodium hydrosulfide|
|Related compounds||potassium sulfide|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
Potassium hydrosulfide is the inorganic compound with the formula KHS. This colourless salt consists of the cation K+ and the bisulfide anion [SH]−. 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. It is prepared by neutralizing aqueous KOH with H2S. Aqueous solutions of potassium sulfide consist of a mixture of potassium hydrosulfide and potassium hydroxide.
The structure of the potassium hydrosulfide resembles that for potassium chloride. Their structure is however complicated by the non-spherical symmetry of the SH− anions, but these tumble rapidly in the solid high temperatures.
Addition of sulfur gives dipotassium pentasulfide.
- Dittmer, D. C. “Potassium Hydrogen Sulfide” in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi: 10.1002/047084289.
- Kurzer, F. Lawson, A. “Thiobenzoylthioglycolic Acid” Organic Syntheses, Collected Volume 5, p.1046 (1973). 
- Haarmann, F; Jacobs, H.; Roessler, E.; Senker, J. (2002). "Dynamics of Anions and Cations in Hydrogensulfides of Alkali Metals (NaHS, KHS, RbHS): A Proton Nuclear Magnetic Resonance Study". Journal of Chemical Physics 117 (3): 1269–1276. doi:10.1063/1.1483860.