Bulk Trimethoprim Base Crystals from Japan
Pure trimethoprim free base in crystalline form for pharmaceutical compounding, under HTS 2933.59.22.00 as aromatic anti-infective. Used in custom antibiotic suspensions and tablets. Chemically defined pyrimidine compound meeting chapter purity standards.
Duty Rate — Japan → United States
21%
Rate breakdown
9903.04.628.5%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide polymorphic form certificate (Form I most common) for IP validation
• Ensure <0.5% water content to prevent hydrate formation reclassification
• Declare crystal habit (prismatic) which affects tableting and potential dosage form shifts