Aminophylline USP from Japan
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 — Japan → United States
15%
Rate breakdown
9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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