Chlorpheniramine Maleate from Canada
Chlorpheniramine is an aromatic amino-compound with ether oxygen function, an antihistamine. Classified HTS 2922.50.4000 as aromatic oxygen-function amino-compound. Maleate salt follows base per Chapter notes on organic salts.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide chiral purity certificates; ensure GMP compliance for pharma intermediates; watch for country-specific antihistamine controls