Potassium Phosphate
Reviewed by Daisy · Last updated 14 Aug 2026
Also known as: Potassium
Combination of potassium and phosphate | Occurs naturally in the human body
EWG Safety Score
What Is Potassium Phosphate?
Potassium phosphate is a combination of the salt of potassium and phosphorus used in the form of phosphate. This chemical is naturally occurring in the human body, where it is used for repair and growth of cells and tissues.
The potassium phosphate used in skin care products is synthetically produced and primarily used in cosmetics to adjust (buffer) the formula’s pH value, keeping it in the acidic range. It has been ruled safe as used in cosmetics.
Clinical Evidence & References
Published Research
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https://www.uofmhealth.org/health-library/d03790a1 [URL]
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Journal of Research in Medical Sciences, November 2016, ePublication [URL]
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Photochemical and Photobiological Sciences, December 2007, pages 263-268 [URL]
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https://www.cir-safety.org/supplementaldoc/safety-assessment-phosphoric-acid-and-its-salts-used-cosmetics [URL]
From the Clinic
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Cyclodextrin
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