Diphenhydramine Hydrochloride from Canada
Diphenhydramine features benzhydryl amino-ether oxygen function, an ethanolamine antihistamine. Falls under HTS 2922.50.4000 aromatic oxygen-function amino-compounds. Widely used in allergy medications.
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
• Provide hydrochloride salt assay; comply with OTC monograph requirements; distinguish from Chapter 30 finished forms