Thiamine Hydrochloride (Vitamin B1) from China
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 — China → United States
137.5%
Rate breakdown
9903.04.6093.5%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
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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