:Potassium hydrosulfide

{{Chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 428743523

| IUPACName = Potassium hydrosulfide

| ImageFile = Sodium-hydrosulfide-LT-xtal-1991-CM-3D-balls.png

| ImageSize = 250

| OtherNames = Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo = 1310-61-8

| CASNoOther =

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = SX1L03AL9I

| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}

| PubChem = 102109

| RTECS =

| EINECS = 215-182-9

| ChemSpiderID = 92246

| InChI = 1/K.H2S/h;1H2/q+1;/p-1

| InChIKey = ZOCLAPYLSUCOGI-REWHXWOFAJ

| StdInChI_Ref = {{stdinchicite|changed|chemspider}}

| StdInChI = 1S/K.H2S/h;1H2/q+1;/p-1

| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}

| 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 =

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|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

}}

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Potassium hydrosulfide is an inorganic compound with the formula KSH. This colourless salt consists of the cation {{chem2|K+}} and the bisulfide anion {{chem2|[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.{{cite encyclopedia|author=Dittmer, Donald C.|chapter = Potassium Hydrogen Sulfide | encyclopedia = Encyclopedia of Reagents for Organic Synthesis | editor = Paquette, L. | publisher = J. Wiley & Sons, New York | year = 2001 | doi = 10.1002/047084289X.rp227|isbn = 0471936235 }} 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 {{chem2|SH−}} anions, but these tumble rapidly in the solid.{{cite journal |author1=Haarmann, F |author2=Jacobs, H. |author3=Roessler, E. |author4=Senker, J. | title = Dynamics of Anions and Cations in Hydrogensulfides of Alkali Metals (NaHS, KHS, RbHS): A Proton Nuclear Magnetic Resonance Study | journal = Journal of Chemical Physics | year = 2002 | volume = 117 | issue = 3 | pages = 1269–1276 | doi = 10.1063/1.1483860|bibcode=2002JChPh.117.1269H | doi-access = free }}

The addition of sulfur gives dipotassium pentasulfide.