Chelarage agent that helps preserve cosmetic products by neutralizing metal ions (especially iron) in the composition (which usually get out of the water). Its peculiarity is that it also acts as a biostatic and fungistical agent and remains active even at high pH.
It is often associated with antimicrobial glycols (such as propandiol) to create a "preservative without preservatives" for cosmetic products.
The component is used by a preservative, but also slows down mold growth. In some cases, cha was used as a replacement for parabens in skin care products