Tetramethylpyrazine from China
A specific pyrazine derivative explicitly listed under HTS 2933.99.1200, featuring a six-membered aromatic nitrogen heterocycle. Used as a flavoring agent in food and in pharmaceutical formulations for circulatory disorders. Its precise chemical structure matches the tariff nomenclature.
Duty Rate — China → United States
100%
Rate breakdown
9903.04.6094.2%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
• FEMA GRAS status documentation for food flavor use
• Specify intended use (food vs pharma) on commercial invoice
• CoA required confirming synthetic origin vs natural extract