Namely
This ingredient is used in cosmetics as anionic surfactant, it produces abundant foam. It can cause irritation but is known to be milder than a Sodium Lauryl Sulfate for example.
It does not break environmental problems and is biodegradable.
Its functions (INCI)
Cleansing : Helps to keep a clean surface
Foaming : Capturing small air bubbles or other gases in a small volume of liquid by changing the surface tension of the liquid
Surfactant : Reduces the surface tension of cosmetics and contributes to the even distribution of the product when it is used