Carfentanil from Mexico
Carfentanil is a potent fentanyl analog and derivative featuring a 4-anilinopiperidine core with a pyridine-like heterocyclic nitrogen structure, used primarily in veterinary medicine. It is classified under HTS 2933.34.00.00 as an 'other fentanyl' due to its chemical relation to fentanyl and inclusion of unfused pyridine ring elements. This separate chemically defined organic compound fits chapter 29 provisions for heterocyclic compounds.
Duty Rate — Mexico → United States
110%
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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Secure special veterinary import permits and Schedule I DEA quotas; ensure stabilizer additions comply with chapter note (f) without altering general use; watch for misclassification as veterinary premix leading to higher scrutiny