Phenobarbital Sodium from Mexico
Phenobarbital sodium is the sodium salt of phenobarbital, a barbituric acid derivative containing a pyrimidine ring structure. It is classified under HTS 2933.52.9000 as 'other' malonylurea (barbituric acid) and its salts, distinct from specific barbiturates like those in 2933.52.10. This chemically defined heterocyclic compound fits chapter 29 note (a) for separate organic compounds.
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
• Verify chemical purity certificates and CoA to confirm classification as barbituric acid salt under Chapter 29
• Include DEA import permit documentation due to controlled substance status; ensure proper labeling
• Avoid misclassification as finished dosage forms (Chapter 30); ship as bulk API only