Aromatic Alpha-Blocker Doxazosin Mesylate from China
Doxazosin mesylate is a quinazoline-based alpha-1 blocker used as an active pharmaceutical ingredient for treating hypertension and benign prostatic hyperplasia. It is a separate chemically defined organic compound with an aromatic structure, and its mesylate salt is classified with the parent compound under tariff item 2942.00.00 as an 'other organic compound' since it is not more specifically covered by other headings in Chapter 29.
Duty Rate — China → Canada
Import Tips
• Ensure the product is a pure API and not formulated into dosage forms, which would fall under Chapter 30
• Provide the certificate of analysis and confirm the salt form, as classification follows the parent compound
• Verify that the product is not listed under a more specific heading, such as heterocyclic compounds