Monosodium Phosphate
What is Monosodium Phosphate?
Monosodium Phosphate is the sodium salt of phosphoric acid, appearing as a white crystalline powder that is highly soluble in water. In skincare products, it functions primarily as a pH adjuster, buffering agent, and mild exfoliant due to its ability to regulate acidity and provide gentle abrasiveness. It is commonly found in cleansers, toners, and moisturizers to maintain product stability and enhance skin feel.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Buffering agent
Maintains the pH stability of a formulation.
Chelating agent
Binds to metal ions to prevent them from affecting product stability or skin.
PH adjuster
Raises or lowers pH to the target range, supporting ingredient performance, preservative efficacy, stability, and user comfort.