Tetrasodium EDTA is a chelator that can also be found in moisturizers, foundations, eye shadows and other cosmetic products. It removes soap scum and mineral deposits that are caused by hard water. The word chelator (pronounced "key-lay-tor") comes from the Greek word chele, or claw. Think of a chelator as a tiny claw that reaches out and grabs the minerals in soap scum or soils, to keep them from depositing on a surface. By binding to the soap scum or deposit, Tetrasodium EDTA allows them to be rinsed away. Tetrasodium EDTA is derived from sodium salts. Given the widespread use of EDTA, there are some concerns regarding the persistence and bioaccumulation in the environment, and the potential for EDTA to mobilize metals in the soils. For these reasons, while there are no concerns to public health from EDTA, SC Johnson is working to reduce and phase out EDTA in our products.