Histamine Dihydrochloride from China
Histamine dihydrochloride, containing imidazole ring, used in pharmaceutical standards and research. Falls under HTS 2933.29.90.00 as a chemically defined compound with unfused imidazole ring and nitrogen hetero-atoms.
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
• Include batch-specific potency assay confirming pharmacological activity
• Label as 'Research Use Only' to avoid FDA finished product requirements
• Salt form classifies with parent imidazole per Chapter 29 note 5(C)(1)