abstract |
(57) Abstract: Hydroxyundecanoic acid characterized by adding an azeotropic agent to hydroxyundecanoic acid, performing steam distillation at a temperature of 150 ° C. or more, and then hydrolyzing the produced hydroxyundecanoic acid polymer. Acid deodorization method. [Effect] Hydroxyundecanoic acid having a reduced odor useful as a sebum secretion inhibitor can be obtained. |