Cocamidopropyl Betaine aka coco betaine

Cocamidopropyl Betaine  is an amphoteric surfactant derived from coconut oil and used in shampoos, body washes and personal care products.
It is also used as an emulsifying and thickening agent and has great foaming properties.
Cocamidopropyl Betaine is very compatible with other surfactants.
It is known to be unharsh and non irritating to the skin.