Mercaptoethanesulfonic Acid Sodium Salt from Germany
Sodium 2-mercaptoethanesulfonate (mesna) contains both thiol and sulfonic acid groups but classified under HTS 2930.90.4950 based on principal organo-sulfur characteristics. Direct C-S linkages qualify; used as mucolytic and cytoprotective agent in chemotherapy.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Provide sulfonic vs sulfinic acid differentiation via NMR
• Include ICH stability data for pharma grade material
• Declare bulk API status vs finished dosage to maintain Chapter 29 classification