Thiamine Hydrochloride (Vitamin B1) from Canada
Thiamine hydrochloride contains a substituted pyrimidine-thiazolium structure with an unfused aromatic thiazole ring, classified as a vitamin but tariffed as its heterocyclic component. Falls under HTS 2934.10.20.00 as 'other' aromatic thiazole compound per Chapter 29 precedence. The thiazole ring determines classification over vitamin function.
Duty Rate — Canada → United States
6.5%
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 USP/NF certificate confirming thiazole content despite vitamin labeling
• FDA registration required; declare pharmaceutical grade to avoid food supplement reclassification
• Specify 'thiazole derivative' on commercial invoice to support HTS 2934.10 classification