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Dyphylline USP Powder from Canada

Dyphylline is a xanthine derivative with pyrimidine structure, used as a theophylline alternative in bronchodilators. HTS 2933.59.70.00 applies to this aromatic heterocyclic compound listed in U.S. note 3. It is imported as high-purity USP grade.

Duty Rate — Canada → United States

100%

Rate breakdown

9903.04.6093.5%Pharmaceuticals Annex IV: 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

Ensure chiral purity documentation if enantiomer-specific

Avoid retail packaging to stay in chemical classification vs

Chapter 30

Test for related substances per USP monograph before export

Dyphylline USP Powder from Canada — Import Duty Rate | HTS 2933.59.70.00