Tartaric Acid
Tartaric acid (INCI: Tartaric Acid) is an alpha-hydroxy acid (AHA) with the chemical name 2,3-Dihydroxybutanedioic Acid, registered under CAS # 133-37-9 / 147-71-7 / 87-69-4. According to CosIng, its official functions are buffering and masking, though it is widely used in cosmetics as an exfoliant. It appears in a range of products including peels, serums, toners, and hair care formulations.
Tartaric acid functions as a chemical exfoliant, helping to loosen and remove dead skin cells from the surface of the skin. It also serves a buffering role, helping to adjust and stabilize the pH of formulations. Its presence in AHA-based serums and peels suggests use for skin refinement and brightening.
As an AHA exfoliant, tartaric acid may increase photosensitivity; sun protection is generally advised when using AHA-containing products. May cause irritation in sensitive skin, particularly in higher-concentration peel formulations.
