San Shield

San Shield Encyclopedia

Ethylenediaminetetraacetic Acid Disodium (EDTA Disodium)

Ethylenediaminetetraacetic Acid Disodium, mainly functions as a chelating agent and pH regulator in San Shield. It stabilizes the ingredients in San Shield, prevents the adverse effects of metal ions, and maintains the acid-base balance with the skin. These properties make Ethylenediaminetetraacetic Acid Disodium an important functional ingredient in skincare products.


Efficient chelating action:*

Ethylenediaminetetraacetic Acid Disodium is widely used as a chelating agent in personal care and beauty products. Its primary function in San Shield is to bind with metal ions, particularly calcium, magnesium, iron, and other ions present in water, forming stable complexes. In water-based products, the presence of metal ions can lead to chemical reactions, oxidation, discoloration, and quality degradation. Ethylenediaminetetraacetic Acid Disodium efficiently chelates these metal ions, preventing their adverse effects on the product, while improving its stability and quality.

【”The chelation effect” refers to a chemical reaction or process in which one chemical substance binds with metal ions in another chemical substance to form a coordination compound. Chelating agents are compounds or substances capable of forming stable coordination compounds with metal ions.】


pH regulation and balance:

Ethylenediaminetetraacetic Acid Disodium also has the ability to regulate the pH value of the product. The ideal pH range for the skin is slightly acidic to neutral, typically around 5.5. Maintaining the proper pH value helps preserve the skin’s protective barrier function and overall health. Ethylenediaminetetraacetic Acid Disodium helps in adjusting the acidity or alkalinity of the product, ensuring its compatibility with the skin’s pH level, thus providing optimal skincare benefits.


Prevention of adverse effects of metal ions:

Metal ions present in water, such as calcium, magnesium, iron, can interact with other ingredients in skincare products, leading to quality deterioration. The chelating action of Ethylenediaminetetraacetic Acid Disodium allows it to bind with these metal ions, preventing their undesired effects in the product. This helps prolong the shelf life of San Shield, reducing instability and quality changes.


It’s important to note that everyone’s reaction to these ingredients may vary. It is recommended to perform a patch test on a small area of skin before using any new product to ensure there are no adverse reactions.