Sulfisoxazole Acetyl from Canada
Sulfisoxazole acetyl is the acetylated prodrug form of sulfisoxazole, a short-acting sulfonamide antibiotic effective against urinary tract infections. It qualifies under HTS 2935.90.4800 as a sulfonamide anti-infective per Chapter 29 structure, where the acetyl group doesn't alter primary sulfonamide classification. Used primarily in pediatric formulations.
Duty Rate — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Include hydrolysis studies demonstrating conversion to active sulfisoxazole for anti-infective classification justification
• Verify no Chapter 30 exclusions apply; must be bulk API, not formulated pediatric suspension