Sulfisoxazole Diolamine from China
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 — 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
• 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