Pentasodium Pentetate

Pentasodium pentetate is a chelating agent (DTPA salt) used at low levels (typically ~0.05–0.2%) to bind metal ions and improve formula stability rather than act on skin. Clinical experience and patch-test data for chelators show a low irritation profile overall, but in very compromised or highly reactive skin it can occasionally contribute to stinging/dryness by slightly increasing ionic load or enhancing penetration of other irritants. Given sensitive-skin safety priorities, I rate it as very gentle rather than inert. Safety Notes: Pentasodium pentetate (DTPA) is a strong chelating agent used primarily to bind trace metals and improve stability/preservative performance; in many mass-market leave-on and rinse-off products it appears at very low levels around 0.005–0.05% as a supportive stabilizer. Higher-strength consumer products (especially clarifying cleansers, exfoliating/acid systems, and some high-performance hair/skin cleansing formulas) have been observed using ~0.1–0.3%, with an upper end around 0.5% in specialized OTC formulations where robust chelation is needed for stability and performance. It is not subject to a specific EU/FDA maximum for cosmetics, so practical limits are driven by formulation tolerability, ionic strength, and cost rather than regulation.