Tolpropamine Hydrochloride from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include stability studies for antihistamine formulations
• Verify compliance with FDA OTC monograph if applicable
• Document impurity profile per ICH guidelines