Lipoic Acid from China
Alpha-lipoic acid contains a five-membered dithiolane ring with sulfur atoms directly linked to carbon. Classified under 2930.90.92 as other organo-sulfur compound used as nutritional supplement and antioxidant. Qualifies per Chapter 29 notes for heterocyclic sulfur compounds.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• FDA prior notice required for dietary supplement imports; include NDI status documentation
• Purity >98% certification essential to distinguish from synthetic mixtures
• Labeling must specify racemic or R- form to avoid pharmaceutical classification issues