After-shampoo acid rinse

The most important shampoo hair conditioners are the alkylamido alkylamines. As a rule, they are complex mixtures derived from the reaction of alkyl-substituted imidazolines with chlo-roacetic acid or ethyl acrylate [8]. Similar to the acylated protein derivatives, these amphoteric surfactants exhibit detergency, are compatible with anionic detergents, and reportedly form complex salts with anionics. These complexes reportedly do not sting the eyes and are employed in baby shampoos. These amphoterics in combination with anionic detergents leave the hair conditioned after rinsing. 

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