Lipoic Acid (Alpha-Lipoic Acid) from China
Alpha-lipoic acid contains a five-membered disulfide ring with carboxylic acid, classified under HTS 2930.90.4950 as organo-sulfur acid. Direct C-S bonds qualify; cyclic but not excluded heterocyclic per note 8. Used as antioxidant supplement and diabetes treatment.
Duty Rate — China → United States
41.7%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include R/S racemic mixture specification (rac-alpha-lipoic acid)
• Provide USP assay >98% and heavy metals certification
• Distinguish bulk powder from encapsulated supplement form