Sulfurated Potash

Synonyms: Foie de Soufre; Hepar Sulfuris; Hígado de azufre; Kalii Sulfidum; Liver of Sulphur; Potasa sulfurada; Potassa Sulphurata; Schwefelleber; Sulphurated Potash.
Cyrillic synonym: Серная Печень.

💊 Chemical information

CAS — 39365-88-3.


In US.

USP 31

(Sulfurated Potash). A mixture composed chiefly of potassium polysulfides and potassium thiosulfate, containing not less than 12.8% of sulfur as sulfide. Irregular, liver-brown pieces when freshly made, changing to greenish-yellow. It has an odour of hydrogen sulfide. Soluble 1 in 2 of water, usually leaving a slight residue. Alcohol dissolves only the sulfides. A 10% solution is light brown in colour and alkaline to litmus. Store in small, airtight containers.


Sulfurated potash is incompatible with acids.

💊 Profile

Sulfurated potash has been used in the treatment of acne and other skin disorders usually in the form of a lotion with zinc sulfate.

💊 Preparations

USP 31: Zinc Sulfide Topical Suspension. Proprietary PreparationsMulti-ingredient: Austria: Leukona-Sulfomoor-Bad†.
Published January 17, 2019.