Phthalylsulfathiazole from Japan
Phthalylsulfathiazole (Talinol) provides poor absorption for localized intestinal antibacterial action against Shigella and E. coli. HTS 2935.90.4800 as sulfonamide anti-infective ester per Chapter 29 classification notes. Hydrolyzed in alkaline intestine to active form.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• pH-dependent hydrolysis validation required for prodrug status confirmation
• Melting point range 195-205°C specification prevents free base contamination
• No Chapter 30 classification even for poorly absorbed gut therapeutics