DL-Methionine from Mexico
DL-Methionine is a synthetic essential amino acid used primarily as a nutritional supplement in animal feed to promote growth and health. It falls under HTS 2922.49.49 as an other amino acid with oxygen-function (carboxyl group) and no more than one kind of oxygen function. This classification applies to its pure chemical form, separate from mixtures or salts.
Duty Rate — Mexico → United States
14.2%
Rate breakdown
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 purity >98% and chemical identity to avoid misclassification as mixtures
• Declare exact CAS number (59-51-8) on entry documents; ensure labeling meets FDA feed additive requirements
• Watch for anti-dumping duties if sourced from China; verify supplier documentation for origin