Potassium hydrosulfide

Potassium hydrosulfide
Names
	IUPAC name Potassium hydrosulfide
	Other names Potassium bisulfide, Potassium sulfhydrate, potassium hydrogen sulfide
Identifiers
CAS Number	1310-61-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	92246 ;
ECHA InfoCard	100.013.803
EC Number	215-182-9;
PubChem CID	102109;
UNII	SX1L03AL9I ;
CompTox Dashboard (EPA)	DTXSID6061654 ;
	InChI InChI=1S/K.H2S/h;1H2/q+1;/p-1 Key: ZOCLAPYLSUCOGI-UHFFFAOYSA-M ; InChI=1/K.H2S/h;1H2/q+1;/p-1 Key: ZOCLAPYLSUCOGI-REWHXWOFAJ;
	SMILES [SH-].[K+];
Properties
Chemical formula	KHS[1]
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
Hazards
Main hazards	Flammable solid, stench, releases hydrogen sulfide
NFPA 704 (fire diamond)	2 3 0
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.[2] It is prepared by neutralizing aqueous KOH with H₂S.[3] 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.[4]

Addition of sulfur gives dipotassium pentasulfide.

Synthesis

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

References

Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. p. 4-82. ISBN 978-1-4200-9084-0.
Dittmer, Donald C. (2001). "Potassium Hydrogen Sulfide". In Paquette, L. (ed.). Encyclopedia of Reagents for Organic Synthesis. J. Wiley & Sons, New York. doi:10.1002/047084289X.rp227.
Kurzer, F.; Lawson, A. (1962). "Thiobenzoylthioglycolic Acid". Organic Syntheses. 42: 100. doi:10.15227/orgsyn.042.0100.; Collective Volume, 5, 1973, p. 1046
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.

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[crc-1] Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. p. 4-82. ISBN 978-1-4200-9084-0.

[2] Dittmer, Donald C. (2001). "Potassium Hydrogen Sulfide". In Paquette, L. (ed.). Encyclopedia of Reagents for Organic Synthesis. J. Wiley & Sons, New York. doi:10.1002/047084289X.rp227.

[3] Kurzer, F.; Lawson, A. (1962). "Thiobenzoylthioglycolic Acid". Organic Syntheses. 42: 100. doi:10.15227/orgsyn.042.0100.; Collective Volume, 5, 1973, p. 1046

[4] 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.