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Aminophylline USP Powder 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 2933.59.59.00 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 — Canada → United States

100%

Rate breakdown

9903.04.6096.3%Pharmaceuticals: patented pharma articles — 100% 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

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)

Aminophylline USP Powder from Canada — Import Duty Rate | HTS 2933.59.59.00