Thiamine Propyl Disulfide from Japan
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 — Japan → United States
15%
Rate breakdown
9903.04.6215%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.860%Universal product exemption (U.S. note 52(b))
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Disulfide bond stability testing required for 36-month shelf life claims
• Avoid bulk packaging >25kg to prevent HAZMAT shipping requirements