Dipotassium Phosphate

Dipotassium Phosphate (K₂HPO₄) is an inorganic salt derived from phosphoric acid and potassium hydroxide, widely used in cosmetics as a buffering agent to maintain alkaline pH ranges between 8.5-9.5. Its unique ability to stabilize protein-based formulations makes it particularly valuable in products containing peptides, amino acids, or collagen, where it prevents aggregation and maintains structural integrity. Formulators choose this ingredient over other phosphate buffers when they need both pH control and the additional benefit of potassium ions, which can support skin barrier function.