L-Histidine Base from Mexico
L-Histidine Base serves in buffer solutions and allergy research supplements. HTS 2922.49.80.00 applies to this imidazole-containing amino acid with single carboxyl function.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include NMR spectra confirming structure; label moisture content <0.5%; comply with biotech import permits if for lab use