Mesna USP from China
Mesna is an organo-sulfur compound used as a cytoprotective agent during chemotherapy to prevent hemorrhagic cystitis. Its mercaptoethane sulfonate structure has sulfur directly linked to carbon atoms per heading 2930 definition. Classified as a pharmaceutical drug in 2930.90.92.35.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Include clinical trial data references if for investigational use to expedite FDA clearance
• Specify pH stability range in COA as it's critical for classification integrity
• Prevent reclassification by documenting exclusion from Chapter 38 fire-extinguisher chemicals