Thiamine Propyl Disulfide from Canada
Thiamine propyl disulfide (TPD) offers improved bioavailability over thiamine HCl for oral supplements. Classified HTS 2936.22.00.00 as synthetic vitamin B1 derivative for nutritional fortification. Stable in tablet matrices.
Duty Rate — Canada → 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
• Disulfide bond stability testing required for 36-month shelf life claims
• Avoid bulk packaging >25kg to prevent HAZMAT shipping requirements