Chlorpheniramine Maleate from Mexico
Chlorpheniramine maleate is an alkylamine antihistamine with modified aromatic structure used for allergies and sometimes nausea. Imported under HTS 2933.59.21.00 as it qualifies among aromatic antihistamines per subheading scope. Chapter notes allow salt classification with acid/base.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Maleate salt declared per note C(2)—base last in order; provide chiral purity data
• Common error: packaging implying retail (Chapter 32 exclusion)
• Temperature-controlled shipping required