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A type of tannin, a naturally occurring polyphenol found in many plants. In cosmetics, it acts as an astringent, antioxidant, and skin-conditioning agent, often used to tighten pores or soothe irritated skin.
Beneficial for
Safety summary
Generally safe for topical use in appropriate concentrations. High concentrations can be irritating.
CAS Number
1401-55-4
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.