Hydroxyethylpiperazine Ethane Sulfonic Acid Sodium Salt
What is Hydroxyethylpiperazine Ethane Sulfonic Acid Sodium Salt?
Hydroxyethylpiperazine Ethane Sulfonic Acid Sodium Salt, commonly known as HEPES sodium salt, is the sodium salt form of HEPES, a zwitterionic buffering agent used in skincare formulations to maintain optimal pH levels. It functions similarly to biological buffering systems, stabilizing the skin's natural pH (around 5.5) which is crucial for barrier function and enzyme activity. In cosmetics, it enhances the stability and efficacy of pH-sensitive active ingredients like retinoids and peptides.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Solubilizing agent
Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.
Buffering agent
Maintains the pH stability of a formulation.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
PH adjuster
Raises or lowers pH to the target range, supporting ingredient performance, preservative efficacy, stability, and user comfort.