Sulfisoxazole Acetyl from China
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 — China → United States
19%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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