EDTA disodium (ethylenediaminetetraacetic acid) is a water-soluble acid and an emulsified stable preservative with chelating properties. It works by binding with metal ions in the solution, causing them to lose their activity. In skin care products, this helps prevent cosmetic formulas and other personal care products (such as lotion and face cream) from deteriorating. Overall, disodium can protect the integrity of skin products, preventing unnecessary changes in viscosity, pH, odor, or texture. Helps prevent the growth of bacteria, yeast, and mold in skincare products. Although preservatives often have a bad reputation in the skincare industry, they help extend the shelf life of products and prevent bacterial contamination. Moreover, disodium synthetic preservatives have lower skin irritation than some natural preservatives and are less likely to have adverse reactions with other ingredients in cosmetics. In addition, when combined with calcium, iron or magnesium, EDTA disodium can enhance foam and cleaning ability. In addition to being used as a preservative in cosmetics, EDTA disodium can also enhance the permeability of the skin barrier and assist other ingredients in penetrating deeper into the skin, allowing active ingredients in skincare products to penetrate deeply and produce better skincare effects. Moreover, disodium is a well tolerated ingredient that is suitable for a wide range of skin types, so it is not easy to cause allergic reactions.