Potassium Phosphate



No known benefits

Potassium Phosphate at a glance

  • Combination of potassium and phosphate
  • Occurs naturally in the human body
  • Used in cosmetics primarily as a pH adjuster
  • Ruled safe as used in makeup and skin care

Potassium Phosphate description

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.

Potassium Phosphate references

  • https://www.uofmhealth.org/health-library/d03790a1
  • Journal of Research in Medical Sciences, November 2016, ePublication
  • Photochemical and Photobiological Sciences, December 2007, pages 263-268
  • https://www.cir-safety.org/supplementaldoc/safety-assessment-phosphoric-acid-and-its-salts-used-cosmetics

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


We couldn't find this in our ingredient dictionary. We log all missing ingredients and make continuous updates.

Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.