| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method of an N-long chain acylamino acid or a salt thereof that can efficiently remove or reduce impurities such as long chain fatty acids, long chain fatty acid salts and so on which are by-products in a usual N-long chain acylamino acid production and difficult to remove. SOLUTION: The production method of an N-long chain acylamino acid or a salt thereof comprises a step of reacting a 10-18C saturated straight chain fatty acid halide with an amino acid in the presence of an alkali. In this case, characteristically, the reactant is purified by recrystallization.
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