Aminophylline USP Powder 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 2933.59.59.00 as a drug featuring pyrimidine heteroatoms not specified elsewhere in the subheading. This classification applies to its pure chemical form for pharmaceutical use.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide FDA Drug Master File and Certificate of Analysis confirming USP purity and pyrimidine structure to avoid reclassification
• Ensure shipments include stability data as required for temperature-sensitive pharmaceuticals to prevent duty disputes
• Declare exact isomer content; mixtures may shift to earlier headings per Chapter 29 note 3(b)