Potassium hydrosulfide
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| Names | |
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IUPAC name
Potassium hydrosulfide
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| Other names
Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide
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| Identifiers | |
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3D model (Jmol)
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| ChemSpider | |
| ECHA InfoCard | 100.013.803 |
| EC Number | 215-182-9 |
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PubChem CID
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| Properties | |
| 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) |
| good | |
| Hazards | |
| Main hazards | Flammable solid, stench, releases hydrogen sulfide |
| NFPA 704 | |
| Related compounds | |
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Other anions
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Potassium hydroxide |
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Other cations
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Sodium hydrosulfide |
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Related compounds
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potassium sulfide |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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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.
Potassium hydrosulfide is synthesized by the reaction between a solution of potassium sulfide with excess hydrogen sulfide.
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