Disodium Ethanoldiglycinate is a chelator that can also be found in a variety of household products including cleaning, water treatment and personal care 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, Disodium Ethanoldiglycinate allows them to be rinsed away. It is good for grabbing onto iron and calcium (hard water stains).