Thiamine Hydrochloride (Vitamin B1) from China
Thiamine hydrochloride contains a substituted pyrimidine-thiazolium structure with an unfused thiazole ring, classified as a vitamin but chemically under thiazole compounds in HTS 2934.10.90.00. This subheading captures complex thiazoles used primarily as pharmaceuticals, consistent with Chapter 29's precedence for heterocyclic classification.
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 of analysis confirming pharmaceutical grade specifications
• Pre-register with FDA for bulk vitamin actives; provide DMF reference if available
• Label shipments clearly as 'Pharmaceutical Intermediate - Not for Direct Human Consumption' to avoid drug classification