Potassium sulfide

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Orange or red crystalline mass. Potassium sulfide has been used for staining and coloring bronze and other metals. It is also used as a photographic toner.

Synonyms and Related Terms

liver of sulfur; potassium monosulfide; dipotassium sulfide; potash sulfurated; hepar sulfuris; potassium sulphide (Br.)


  • Flammable, dangerous fire risk, may ignite spontaneously.
  • Contact causes irritation and may cause corrosion.
  • Toxic by ingestion.
  • MilliporeSigma: SDS

Physical and Chemical Properties

Soluble in water, ethanol, glycerol. Insoluble in ether. Aqueous solutions are alkaline. Deliquescent in air; darkens with age.

Composition K2S
CAS 1312-73-8
Melting Point 910-912 C
Density 1.74-1.75 g/ml
Molecular Weight mol. wt. = 110.3