Thiamine Hydrochloride (Vitamin B1) from Japan
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 — Japan → United States
15%
Rate breakdown
9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
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
• 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