Cocamidopropyl betaine (CAPB) is an organic compound derived from coconut oil and Dimethyl Propylene Amide(DPA). It is a zwitterion, consisting of both a quaternary ammonium cation and a carboxylate. CAPB is available as viscous pale yellow solution that is used as a surfactant in personal care products. The name reflects that the major part of the molecule, the lauric acid group, is derived from coconut oil. Cocamidopropyl betaine to a significant degree has replaced cocamide DEA.
The CAPB production needs two reactions, they are condensation reaction and quaternary ammonium reaction.
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