Sulfapyridine from Canada
Sulfapyridine, a sulfonamide antibiotic with pyridine ring, treats dermatitis herpetiformis. Classified HTS 2933.39.41.00 as pyridine-containing drug despite sulfonamide group, per Chapter 29 numerical order rule. Bulk API for dermatological applications.
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
• Sulfonation documentation confirming pyridine attachment per Chapter Note 4
• Antibiotic sensitivity testing supporting therapeutic classification
• Monitor for veterinary vs human grade distinctions in end-use statements