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2933.59.59.00/Sulfadiazine Free Base/Mexico

Sulfadiazine Free Base from Mexico

Sulfadiazine contains pyrimidine ring linked to sulfonamide, used in antibacterial treatment. HTS 2933.59.59.00 for pyrimidine drugs despite sulfur; organo-sulfur exclusion doesn't apply. Free base form for API use.

Duty Rate — Mexico → United States

13.7%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Sulfonamide analysis to confirm pyrimidine characteristic group

• Veterinary vs human grade declaration affects chapter

• Free base solubility data prevents salt misdeclaration