D(-)-p-Hydroxyphenylglycine Tromethamine Salt from China
Tromethamine (TRIS) salt of d(-)-p-Hydroxyphenylglycine, classified in HTS 2922.50.11.00 per note (C)(2) as salt between organic acid and base, last in numerical order. Used for pH-buffered pharma formulations.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: 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
• ,pH specification critical for intended use validation
• TRIS content may require separate TSCA if >threshold