Potassium hydrosulfide

Potassium hydrosulfide

Names
IUPAC name Potassium hydrosulfide
Other names Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide
Identifiers
CAS Number	1310-61-8 Y
ChemSpider	92246 N
EC Number	215-182-9
Jmol 3D model	Interactive image
PubChem	102109
InChI InChI=1S/K.H2S/h;1H2/q+1;/p-1 N Key: ZOCLAPYLSUCOGI-UHFFFAOYSA-M N InChI=1/K.H2S/h;1H2/q+1;/p-1 Key: ZOCLAPYLSUCOGI-REWHXWOFAJ
SMILES [SH-].[K+]
Properties
Chemical formula	KHS
Molar mass	72.171 g/mol
Appearance	white solid
Density	1.68–1.70 g/cm3
Melting point	455 °C (851 °F; 728 K)
Solubility in water	good
Vapor pressure	{{{value}}}
Related compounds
Other anions	Potassium hydroxide
Other cations	Sodium hydrosulfide
Related compounds	potassium sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

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.

Synthesis

Potassium hydrosulfide is synthesized by the reaction between a solution of potassium sulfide with excess hydrogen sulfide.