Disodium EDTA (chemical formula - C10H16N2Na2O8) is a chelating agent, used to sequester and decrease the reactivity of metal ions that may be present in a product. This white, water-soluble solid is widely used to bind to metal ions like iron and calcium ions and prevent the deterioration of cosmetics and personal care products. Disodium EDTA thus enhances stability of cosmetics.
What is DISODIUM EDTA used for?
Disodium EDTA is widely used and can be found in moisturizers, skincare and cleansing products, personal cleanliness products, bath soaps, shampoos and conditioners, hair dyes, hair bleaches, and many other product types. Disodium EDTA and the related ingredients bind to metal ions which inactivates them. The binding of metal ions helps prevent the deterioration of cosmetics and personal care products thus enhancing their stability. It also helps to maintain clarity, protect fragrance compounds, and prevent rancidity. It is used up to 0.85% concentration in leave-on products. For both skin care and hair care applications, it prevents metal ions from depositing on the surface.
Origin
Disodium EDTA is mainly synthesized from ethylenediamine (1,2-diaminoethane), formaldehyde, and sodium cyanide. This route yields the tetrasodium EDTA, which is converted in a subsequent step into the acid forms.