| abstract |
(57) Abstract: A method for purifying an amphoteric or betaine type surfactant by electrodialysis and a method for using the purified surfactant, especially in a detergent or cosmetic composition. SOLUTION: The aqueous solution of the surfactant is 0.1 to 20% by weight, preferably 0.5 to 1% by weight based on the weight of the surfactant. The constitutional requirement is to contain 0% by weight of alcohol, particularly polyol. |