Trisodium Edta

Trisodium EDTA is a chelating agent typically used at low concentrations (~0.05–0.2%) to bind metal ions and improve formula stability, and it is generally well-tolerated in leave-on and rinse-off products. Clinical experience and patch testing data suggest low irritation potential at these use levels, though compromised skin (e.g., eczema flares) can react to many additives, so it is not considered completely inert. Given its low but nonzero irritation risk in highly reactive patients, a very gentle score is most consistent with patient safety. Safety Notes: Across commercial skincare, trisodium EDTA is most often used as a chelating agent in the ~0.05–0.20% band, with low-end usage around 0.01% in sensitive-skin leave-on emulsions where only minimal chelation is needed. The highest OTC levels observed are about 0.30% in surfactant-heavy rinse-off cleansers/body washes and some high-electrolyte or botanically complex formulas that require stronger metal-ion control for stability and preservative support; higher use is uncommon due to diminishing returns and potential formula feel/compatibility issues. No specific EU/FDA max limit is generally set for EDTA salts in cosmetics, so practical formulation/stability constraints drive the market range.