What it is
EDTA is a chelating agent that sequesters trace metal ions present in a formula or its ingredients. By binding these metals, it helps prevent discoloration, rancidity, and degradation, and it can enhance the effectiveness of preservative systems. It is used at very low concentrations in a wide range of water-containing cosmetics, including sunscreens.
Safety & warnings
EDTA is used at low levels and is generally well tolerated, with low irritation and sensitization potential in cosmetic use. It is water-soluble and is not considered comedogenic.
Origin & sourcing
A synthetic compound; in cosmetics it is most often used in the form of its sodium salts.
Questions everyone asks
What is a chelating agent?
It is an ingredient that binds metal ions. EDTA does this to help keep a formula stable and to support the preservative system.
Why is EDTA in sunscreen?
It is added at low levels to bind trace metals, helping the product stay stable and preventing discoloration and degradation.