Famotidine from China
Famotidine, an H2-receptor antagonist, contains a thiazole ring linked to guanidine and imidazole moieties in its aromatic heterocyclic structure. Classified under HTS 2934.10.20.00 as the principal thiazole component per numerical order rule. Used in ulcer treatment pharmaceuticals.
Duty Rate — China → United States
44%
Rate breakdown
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)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide synthetic pathway documentation showing thiazole as key intermediate
• US Pharmacopeia reference standard certificate supports purity classification
• Distinguish from multi-component mixtures via quantitative HPLC analysis