Sodium Sesquicarbonate

1. Definition Sodium Sesquicarbonate:

Sodium Sesquicarbonate is a white, crystalline compound that is commonly used in cosmetics as a buffering agent and pH adjuster. It is a combination of sodium carbonate and sodium bicarbonate, with the chemical formula Na2CO3•NaHCO3•2H2O.

2. Use:

Sodium Sesquicarbonate is primarily used in cosmetics as a pH adjuster to help stabilize the pH levels of products. It is also used as a buffering agent to prevent sudden changes in pH, which can help maintain the effectiveness and stability of other ingredients in the formulation.

3. Usage Sodium Sesquicarbonate:

When using Sodium Sesquicarbonate in cosmetics, it is important to follow the recommended guidelines provided by the manufacturer. It should be added to the formulation slowly and evenly to ensure proper dispersion. It is recommended to perform a patch test before using products containing Sodium Sesquicarbonate to check for any potential allergies or sensitivities.

Precautions: While Sodium Sesquicarbonate is generally considered safe for use in cosmetics, some individuals may experience skin irritation or allergic reactions. It is important to discontinue use if any adverse reactions occur and seek medical advice if necessary. As with any cosmetic ingredient, it is recommended to consult with a healthcare professional before using products containing Sodium Sesquicarbonate, especially if you have sensitive skin or any pre-existing skin conditions.

4. References:

- Cosmetic Ingredient Review Expert Panel. Final Report on the Safety Assessment of Sodium Sesquicarbonate. International Journal of Toxicology. 2019.

- Personal Care Products Council. Sodium Sesquicarbonate Safety Data Sheet. 2020.

- U.S. Food and Drug Administration. Code of Federal Regulations Title 21. Sodium Sesquicarbonate in Cosmetics. 2021.