Isoniazid (Pyridine-4-Carboxylic Acid Hydrazide) from Canada
Isoniazid is a first-line antituberculosis drug featuring a pyridine carboxylic acid hydrazide structure. Classified in HTS 2933.39.41.00 as a drug with unfused pyridine ring under Chapter 29 heterocyclic provisions. Essential medicine status requires high purity bulk import form.
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 International Nonproprietary Name (INN) certificate and TB treatment end-use letter
• Hydrazide purity testing critical; impurities >1% may reclassify
• Controlled substance monitoring may apply; check DEA import requirements