L-Aspartic Acid USP Grade from Mexico
Pharmaceutical-grade L-aspartic acid meeting USP standards, a chemically defined amino acid used in drug formulations and nutritional supplements. It falls under HTS 2922.49.49.15 as a pure L-isomer of aspartic acid, an oxygen-function amino-acid other than those with multiple oxygen functions. This non-essential amino acid plays a key role in protein synthesis and metabolic pathways.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6095.8%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 Certificate of Analysis (COA) confirming L-isomer purity >98% and USP compliance to avoid reclassification
• Declare exact enantiomeric purity as impurities may trigger Chapter 29 note exclusions
• Include end-use documentation for pharma/food to prevent misclassification as industrial chemical