DL-Methionine from Mexico
DL-Methionine is a synthetic essential amino acid used primarily in animal feed formulations to supplement dietary protein. It falls under HTS 2922.49.80.00 as an amino acid with a single oxygen function (carboxyl group) and no additional kinds of oxygen functions. This classification applies to pure forms without complex ester or salt modifications beyond basic structure.
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
• Verify purity certificates to confirm single oxygen function classification; ensure COA documents amino acid content over 98%; avoid misclassification as feed mixtures under Chapter 23