Cocamidopropyl betaine is a naturally occurring quaternary ammonium derivative often used as a mild surfactant in personal care products. It is derived from coconut oil and has foaming and cleansing properties. Cocamidopropyl betaine is often used in shampoos, body washes and bath products due to its ability to produce abundant lather and gently cleanse skin and hair. It also helps maintain pH balance and reduce potential irritation from other ingredients in cosmetic formulations.