Aminophylline USP from Canada
Aminophylline is a heterocyclic compound containing a xanthine (purine) structure with pyrimidine rings, used as a bronchodilator for asthma treatment. It falls under HTS 2933.59.70.00 as an aromatic pyrimidine derivative listed in additional U.S. note 3 to section VI for specific organic chemicals. This classification applies to its pure chemical form for pharmaceutical use.
Duty Rate — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Verify compliance with additional U.S. note 3 to section VI and provide Certificate of Analysis confirming purity and structure
• Include FDA Drug Master File or import alert documentation for pharmaceutical intermediates to avoid holds
• Label shipments clearly as 'pharmaceutical reference standard' to prevent misclassification as finished drugs