Sodium Citrate (Chelating Agent)

Sodium Citrate is a versatile, naturally derived salt of citric acid widely used in cosmetic and personal care formulations. Known for its buffering and chelating properties, it helps stabilise pH levels, improve product consistency, and enhance the performance of active ingredients. In skincare, sodium citrate contributes to smoother textures, longer shelf life, and improved efficacy of formulations ranging from creams and lotions to shampoos and bath products.

Technical Information

• INCI Name: Sodium Citrate
• CAS Number: 6132-04-3
• Appearance: White crystalline powder or granules
• Solubility: Freely soluble in water
• pH (1% solution): ~7.5 – 9.0
• Functions: Buffering agent, chelating agent, stabiliser
• Origin: Derived from citric acid (plant-based fermentation)
• Storage: Keep in a cool, dry place, tightly sealed to avoid moisture absorption
• Grade: This is a foodgrade ingredient

Usage Information

• Skincare: Used in creams, serums, and lotions to regulate acidity and maintain skin-friendly pH.
• Haircare: Improves stability in shampoos and conditioners, preventing ingredient separation.
• Bath Products: Enhances fizzing action in bath bombs when combined with citric acid and sodium bicarbonate.
• Formulation Tips:
  • Typical usage rate: 0.5% – 5% depending on product type.
  • Dissolve in water phase before combining with other ingredients.
  • Works synergistically with antioxidants to improve shelf life.

By adding Sodium Citrate to your ingredient collection, you ensure that your formulations are balanced, stable, and effective. It’s a small addition that makes a big difference in the quality of your final product.