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Potassium stearate

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Potassium stearate is a metal-organic compound, a salt of potassium and stearic acid with the chemical formula C18H35KO2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.[1][2]

Synthesis

Potassium stearate may be prepared by saturating a hot alcoholic solution of stearic acid with alcoholic potash.[3]

Physical properties

The compound forms colorless crystals.

Slightly soluble in cold water, soluble in hot water, ethanol, insoluble in ether, chloroform, carbon disulfide.[4] A component of liquid soap.

Uses

The compound is primarily used as an emulsifier in cosmetics and in food products. It is also used as a cleansing ingredient and lubricant.[5][6]

Hazards

Causes skin irritation and serious eye irritation.[7]

References

  1. ↑"potassium stearate". paulaschoice-eu.com. Retrieved 7 March 2023.
  2. ↑"Potassium Stearate". Cosmetics Info. Retrieved 7 March 2023.
  3. ↑Allen, Alfred Henry (1886). Commercial Organic Analysis: Being a Treatise on the Properties, Proximate Analytical Examination, and Modes of Assaying the Various Organic Chemicals and Preparations Employed in the Arts, Manufactures, Medicine, &c. With Concise Methods for the Detection and Determination of Their Impurities, Adulterations, and Products of Decomposition. ... P. Biakiston & Son. p. 230. Retrieved 7 March 2023.
  4. ↑"Potassium Stearate". Silver Fern Chemical Inc. Retrieved 7 March 2023.
  5. ↑"Potassium Stearate OPK-1000". Hallstar BPC. Retrieved 7 March 2023.
  6. ↑"potassium stearate | Paula's Choice". Paula's Choice. Retrieved 7 March 2023.
  7. ↑"Potassium Stearate". American Elements. Retrieved 7 March 2023.