Potassium sulfide

Potassium sulfide
Potassium sulfide
Names
IUPAC name
Potassium sulfide
Other names
Dipotassium monosulfide,
Dipotassium sulfide,
Potassium monosulfide,
Potassium sulfide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.816 Edit this at Wikidata
EC Number
  • 215-197-0
RTECS number
  • TT6000000
UNII
UN number 1847 1382
  • InChI=1S/2K.S/q2*+1;-2
    Key: DPLVEEXVKBWGHE-UHFFFAOYSA-N
  • [S-2].[K+].[K+]
Properties
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)
converts to KSH, KOH
Solubility in other solvents soluble in ethanol, glycerol
insoluble in ether
−60.0·10−6 cm3/mol
Structure
antiFluorite
Thermochemistry
105.00 J·mol−1·K−1[1]
-406.2 kJ·mol−1[2]
-392.4 kJ·mol[2]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Causes skin burns. Dangerous for the environment
GHS labelling:
GHS05: CorrosiveGHS09: Environmental hazard
Danger
H314, H400
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).
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Potassium sulfide
Powdered potassium sulfide anhydrous

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.

  1. ^ CRC Handbook of Chemistry and Physics (95th ed.). CRC Press. 2014. pp. 5–15. ISBN 1482208679.
  2. ^ a b Johnson, G.K.; Steele, W.V. (1981). "The standard enthalpy of formation of potassium sulfide (K2S) by fluorine bomb calorimetry". The Journal of Chemical Thermodynamics. 13 (10): 985–990. doi:10.1016/0021-9614(81)90075-6.