Potassium Phosphate is a generic name for three potassium salts of Phosphoric acid (Monopotassium, Dipotassium, and Tripotassium phosphates) inorganic compounds used in skin and hair care applications. It is a safe food-grade ingredient found in almost all human body tissues and is used as an emulsifier, emulsion stabilizer, thickener, and penetration enhancer.
Depending on the potassium atom count, the average pH of the solution varies from 5.8 for monopotassium and 11 for tripotassium phosphate, so it is also used as a buffer to control the pH balance of the formula. Phosphates are involved in the energy production of the cells (Krebs cycle); the result "fuel" molecule ATP (adenosine triphosphate) containing three phosphate parts.
Potassium Phosphate improves adsorption levels of other ingredients while prolonging their action. In addition, thanks to the antiseptic properties of tripotassium phosphate, it is used as a preservative booster which is especially effective in a combination of fatty acids used in creams, moisturizing oils, and masks.