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Tolpropamine Hydrochloride from Japan

Tolpropamine hydrochloride is an antihistamine containing aromatic amine functionality used for allergy relief. Classified under HTS 2921.49.43.00 as a pharmaceutical drug. Features diphenylmethylamine structure typical of first-generation antihistamines.

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

Include stability studies for antihistamine formulations

Verify compliance with FDA OTC monograph if applicable

Document impurity profile per ICH guidelines