Lipoic Acid (Alpha-Lipoic Acid) from Canada
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 — Canada → United States
4.2%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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