Potassium hydrosulfide

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title: "Potassium hydrosulfide" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["potassium-compounds", "hydrosulfides"] topic_path: "general/potassium-compounds" source: "https://en.wikipedia.org/wiki/Potassium_hydrosulfide" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 428743523 | IUPACName = Potassium hydrosulfide |ImageFile = | ImageSize = 250 | OtherNames = Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide |Section1={{Chembox Identifiers | CASNo_Ref = | CASNo = 1310-61-8 | CASNoOther = | UNII_Ref = | UNII = SX1L03AL9I | ChemSpiderID_Ref = | PubChem = 102109 | RTECS = | EINECS = 215-182-9 | ChemSpiderID = 92246 | InChI = 1/K.H2S/h;1H2/q+1;/p-1 | InChIKey = ZOCLAPYLSUCOGI-REWHXWOFAJ | StdInChI_Ref = | StdInChI = 1S/K.H2S/h;1H2/q+1;/p-1 | StdInChIKey_Ref = | StdInChIKey = ZOCLAPYLSUCOGI-UHFFFAOYSA-M | SMILES = [SH-].[K+] |Section2={{Chembox Properties | Formula = KSH | MolarMass = 72.171 g/mol | Appearance = white solid | Density = 1.68–1.70 g/cm3 | Solubility = good | MeltingPtC = 455 | BoilingPt = |Section7={{Chembox Hazards | ExternalSDS = | HPhrases = | PPhrases = | GHS_ref = | MainHazards = Flammable solid, stench, releases hydrogen sulfide | NFPA-H = 3 | NFPA-F = 2 | NFPA-R = 0 | NFPA-S = | FlashPt = |Section8={{Chembox Related | OtherAnions = Potassium hydroxide | OtherCations = Sodium hydrosulfide | OtherCompounds = potassium sulfide 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 has been used in the synthesis of organosulfur compounds. Aqueous solutions of potassium sulfide consist of a mixture of potassium hydrosulfide and potassium hydroxide.

thumb|left|194px|Atomic structure of crystalline KSH according to [[X-ray crystallography]]. Color code: violet = K, yellow = S, white = H.

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.

Potassium hydrosulfide reacts with elemental sulfur to gives polysulfide salts, such as dipotassium pentasulfide.

Synthesis

Potassium hydrosulfide is prepared by neutralizing aqueous KOH with .

References

References

  1. {{cite encyclopedia. Dittmer, Donald C.. J. Wiley & Sons, New York. (2001)
  2. (2002). "Dynamics of Anions and Cations in Hydrogensulfides of Alkali Metals (NaHS, KHS, RbHS): A Proton Nuclear Magnetic Resonance Study". Journal of Chemical Physics.
  3. (1962). "Thiobenzoylthioglycolic Acid".
  4. Robert L. Frank and James R. Blegen. (1948). "Benzoyl Disulfide". Organic Syntheses.

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potassium-compoundshydrosulfides