DL-Methionine
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.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when mixed into animal feed premixes at >2% concentration
Feed preparations containing amino acids are classified under Chapter 23 as preparations for animal feed, not pure chemicals.
If imported as a metal salt like methionine sodium
Salts of amino acids fall under separate subheading 2922.49.70 per chapter notes on salt classification.
If formulated into veterinary medicinal doses
Medicaments containing amino acids as active ingredients shift to Chapter 30 for veterinary products.
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Import Tips & Compliance
• 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
Related Products under HTS 2922.49.49
L-Valine Feed Grade
L-Valine feed grade is a branched-chain essential amino acid supplementing deficient diets in poultry and swine production. HTS 2922.49.49 covers this pure amino acid with single carboxyl oxygen function. Typically 98.5% purity for agricultural applications.
DL-Alanine
DL-Alanine is the racemic mixture of alanine used in biochemical research, cell culture media, and as a food additive. Falls under HTS 2922.49.49 as other amino acids with oxygen-function amino structure. Non-essential amino acid for synthetic biology applications.
L-Serine
L-Serine is a polar amino acid used in cosmetics, pharmaceuticals, and as a precursor for neurotransmitters. Classified under HTS 2922.49.49 as an oxygen-function amino acid (additional hydroxyl group permitted). High purity for biotech and skincare formulations.
L-Aspartic Acid
L-Aspartic Acid serves as a neurotransmitter precursor and aspartame intermediate in food and pharma industries. Falls under HTS 2922.49.49 as other amino acid with single dicarboxylic oxygen function allowed. Used in sweeteners and infusions.
L-Proline
L-Proline is an imino acid critical for collagen synthesis, used in wound healing supplements and biotech. HTS 2922.49.49 includes this cyclic secondary amine amino acid with oxygen function. Essential for protein structure research.
L-Glutamic Acid
L-Glutamic Acid is the precursor to MSG, used in neurobiology research and seasonings. HTS 2922.49.49 for pure dicarboxylic amino acid. Key excitatory neurotransmitter.