Sulfisoxazole Diolamine from Mexico
Sulfisoxazole diolamine is the diethanolamine salt of sulfisoxazole, used in ophthalmic and systemic antibacterial formulations. It qualifies for HTS 2935.90.95.00 as a salt of a sulfonamide antibiotic, classified with the parent sulfonamide per Chapter 29 salt classification rules.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Salt identification via NMR required; diolamine content affects solubility classification
• Ophthalmic grade needs additional microbial limits testing documentation
• Avoid bulk packaging >25kg; triggers additional GMP scrutiny