Pentobarbital Free Acid Form from Mexico
Pentobarbital in its free acid form (non-salt) is explicitly covered under HTS 2933.53.00.00 as pentobarbital (INN). Used in synthesis of injectable formulations. Chemically pure heterocyclic compound per Chapter 29 scope.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.60100%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
• pH specification critical; free acid form (pH 4-6) vs salt (pH 9-11) affects processing
• Particle size distribution data prevents milling duty disputes at customs
• Avoid ethyl alcohol residues from synthesis per Chapter 29 exclusion note 2(b)