Potassium sulfide

Potassium sulfide
Names
	IUPAC name Potassium sulfide
	Other names Dipotassium monosulfide,; Dipotassium sulfide,; Potassium monosulfide,; Potassium sulfide
Identifiers
CAS Number	1312-73-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	142491;
ECHA InfoCard	100.013.816
EC Number	215-197-0;
PubChem CID	162263;
RTECS number	TT6000000;
UNII	31R0R7HD0N ;
UN number	1847 1382
CompTox Dashboard (EPA)	DTXSID70909738 ;
	InChI InChI=1S/2K.S/q2*+1;-2 Key: DPLVEEXVKBWGHE-UHFFFAOYSA-N;
	SMILES [S-2].[K+].[K+];
Properties
Chemical formula	K2S
Molar mass	110.262 g/mol
Appearance	pure: colourless; impure: yellow-brown
Odor	H2S
Density	1.74 g/cm3
Melting point	840 °C (1,540 °F; 1,110 K)
Boiling point	912 °C (1,674 °F; 1,185 K) (decomposes)
Solubility in water	converts to KSH, KOH
Solubility in other solvents	soluble in ethanol, glycerol ; insoluble in ether
Magnetic susceptibility (χ)	−60.0·10−6 cm3/mol
Structure
Crystal structure	antifluorite
Thermochemistry
Std molar; entropy (S⦵298)	105.00 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−406.2 kJ·mol−1
Gibbs free energy (ΔfG⦵)	−392.4 kJ·mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Causes skin burns. Dangerous for the environment
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H400
Precautionary statements	P260, P264, P273, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P391, P405, P501
Related compounds
Other anions	Potassium oxide; Potassium selenide; Potassium telluride; Potassium polonide
Other cations	Lithium sulfide; Sodium sulfide; Rubidium sulfide; Caesium sulfide
Related compounds	Potassium hydrosulfide; Potassium sulfite; Potassium sulfate; Iron(II) sulfide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Potassium sulfide is an inorganic compound with the formula K₂S. The colourless solid is rarely encountered, because it reacts readily with water, a reaction that affords potassium hydrosulfide (KSH) and potassium hydroxide (KOH). Most commonly, the term potassium sulfide refers loosely to this mixture, not the anhydrous solid.

Names


IUPAC name Potassium sulfide
Other names Dipotassium monosulfide, Dipotassium sulfide, Potassium monosulfide, Potassium sulfide
Identifiers
CAS Number	1312-73-8^Y
3D model (JSmol)	Interactive image
ChemSpider	142491
ECHA InfoCard	100.013.816
EC Number	215-197-0
PubChem CID	162263
RTECS number	TT6000000
UNII	31R0R7HD0N^Y
UN number	1847 1382
CompTox Dashboard (EPA)	DTXSID70909738
InChI InChI=1S/2K.S/q2*+1;-2 Key: DPLVEEXVKBWGHE-UHFFFAOYSA-N
SMILES [S-2].[K+].[K+]
Properties
Chemical formula	K₂S
Molar mass	110.262 g/mol
Appearance	pure: colourless impure: yellow-brown
Odor	H₂S
Density	1.74 g/cm³
Melting point	840 °C (1,540 °F; 1,110 K)
Boiling point	912 °C (1,674 °F; 1,185 K) (decomposes)
Solubility in water	converts to KSH, KOH
Solubility in other solvents	soluble in ethanol, glycerol insoluble in ether
Magnetic susceptibility (χ)	−60.0·10⁻⁶ cm³/mol
Structure
Crystal structure	antifluorite
Thermochemistry
Std molar entropy (S^⦵₂₉₈)	105.00 J·mol⁻¹·K⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−406.2 kJ·mol⁻¹
Gibbs free energy (Δ_fG^⦵)	−392.4 kJ·mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Causes skin burns. Dangerous for the environment
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H400
Precautionary statements	P260, P264, P273, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P391, P405, P501
Related compounds
Other anions	Potassium oxide Potassium selenide Potassium telluride Potassium polonide
Other cations	Lithium sulfide Sodium sulfide Rubidium sulfide Caesium sulfide
Related compounds	Potassium hydrosulfide Potassium sulfite Potassium sulfate Iron(II) sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references