3-Nitro-L-Tyrosine from Mexico
3-Nitro-L-tyrosine, a nitrated aromatic amino-acid, falls under HTS 2922.49.30.00 as specified in additional U.S. note 3 for oxygen-function compounds. Applied in oxidative stress studies.
Duty Rate — Mexico → 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
• Nitro group included per note on derivatives; ensure not as coloring matter (chapter 32 exclusion)