Potassium Phosphate Good pH-adjuster-stabiliser 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. Related ingredients: Potassium