Thiamine Allyl Disulfide from China
Thiamine allyl disulfide (TAD) is a lipophilic B1 derivative naturally found in garlic, used in nutritional supplements. Classified under HTS 2936.22.00.00 for its primary vitamin function despite organo-sulfur structure. Provides garlic-like bioavailability enhancement.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Allergen declaration for garlic sensitivity required on labels
• GC-MS testing for allyl sulfide purity to distinguish from food extracts
• Declare natural/synthetic origin to guide FDA jurisdiction