L-Lysine Acetate from Mexico
L-Lysine acetate is the acetic acid salt of L-lysine, used primarily in cell culture media and biopharmaceutical production as a stable, soluble amino acid source. Classified under 2922.41.00.90 as an 'other' ester/salt of lysine per Chapter 29 notes on organic salts. Its single carboxyl oxygen function defines it as a basic amino acid derivative.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide stability data and endotoxin specs (<1 EU/mg) for biotech import clearance
• Label with CAS 927-54-8 and confirm ≥99% purity to avoid reclassification