Potassium Phosphate ●
TL;DR. This ingredient is primarily a buffering and pH-adjusting mineral salt, helping formulas hold a target pH and support preservative and active-ingredient performance.
What does Potassium Phosphate do in a cosmetic formula?
This ingredient is primarily a buffering and pH-adjusting mineral salt, helping formulas hold a target pH and support preservative and active-ingredient performance.
Is Potassium Phosphate clean?
It is generally well tolerated, not a common allergen, and has little clean-standard friction in typical cosmetic use. The main caveat is not skin tolerance, but broader wastewater nutrient contribution from this material class.
Is Potassium Phosphate sustainable?
This material is inorganic and mineral-derived or made through neutralization chemistry, so biodegradability does not apply in the usual organic-carbon sense. Its main sustainability concern is nutrient loading in waterways at large scale, rather than persistence or bioaccumulation.
Is Potassium Phosphate COSMOS-approved?
It is generally compatible with COSMOS-natural and COSMOS-organic formulations when used as an allowed mineral-origin buffer or pH adjuster, subject to grade and supplier documentation. Its Green Chemistry fit is moderate: simple, water-soluble, and low-reactivity, but not renewable and not free of wastewater-nutrient considerations.
How does Potassium Phosphate work chemically?
The molecule is an inorganic ionic salt that dissociates in water and participates in an acid/base buffering system with relevant pKa regions near 2.1, 7.2, and 12.3 depending on the salt form. It is typically used at low buffer levels, often below 1%, and can influence electrolyte-sensitive thickeners, emulsions, and interactions with multivalent metal ions.
Last updated 2026-05-13