SODIUM HYDROXIDE

Sodium hydroxide, also known as caustic soda, is an alkaline salt and is used in cosmetics in small quantities as a pH regulator. This ensures that the end product reaches the desired pH range to ensure skin compatibility and product stability(1).

(1) Burnett, C. L., Bergfeld, W. F., Belsito, D., Hill, R. A., Klaassen, C. D., Liebler, D., Marks, J. G., Shank, R. C., Slaga, T. J., Snyder, P. W., Gill, L. J. & Heldreth, B. (2021). Safety assessment of inorganic hydroxides as used in cosmetics. International Journal of Toxicology, 40(2), 16-35.