Cosmetic chelating agent EDTA disodium

 

EDTA believes that everyone has heard of it as a chelating agent, which can be seen in fields such as daily chemistry, agriculture, and biochemical testing. Xiao Sheng has already written more than a hundred articles about EDTA, but in the past few days, she still received several questions about the use of EDTA disodium as a cosmetic ingredient. Therefore, she decided to write this article and provide a detailed introduction to the use of EDTA disodium as a cosmetic additive.

 

1. What is EDTA disodium?

EDTA disodium is "disodium ethylenediaminetetraacetic acid", which, like EDTA, can chelate most metal ions. However, EDTA has a lower solubility in water, while EDTA disodium has a higher solubility. Therefore, for the convenience of application, EDTA disodium is generally mainly used in cosmetics.

 

2. Is the use of EDTA disodium in cosmetics toxic?

EDTA disodium is used in very small amounts in cosmetics and is non-toxic. According to the regulations on the use of cosmetics additives, the concentration of EDTA disodium in a cosmetics product is usually below 0.2%. Moreover, according to the usage characteristics of cosmetics, when a small amount is taken and used on the face each time, the skin layer blocks a portion of the absorption, and the actual amount of ingredients entering the bottom layer of the skin is actually very small, so there is no need to worry about this.

 

3. The role of EDTA disodium in cosmetics

① Chelated metal ions

In the production process of cosmetics, metal ions may be introduced into water, production equipment, and other raw materials. EDTA disodium can grasp the metal ions mixed into cosmetics like a crab, thereby maintaining the stability of makeup and reducing the harm of metal ions to the skin.

 

② Anticorrosive effect

EDTA has a preservative and synergistic effect. It has good antibacterial ability against Gram negative bacteria and Pseudomonas aeruginosa, and can reach 99.9% antibacterial ability against the latter. It is worth noting that it has no significant effect on Gram positive bacteria. So it needs to be used together with other preservatives