L-Threonine USP Grade
L-Threonine USP is a high-purity enantiomer of the essential amino acid used in pharmaceuticals, supplements, and livestock nutrition. Classified under HTS 2922.49.49 as an other oxygen-function amino acid in pure form. Meets USP standards for human and animal consumption.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing multiple oxygen functions like ether derivatives
Amino alcohols or compounds with additional oxygen groups move to heading 2922.50.
If chemically modified as provitamins or vitamin intermediates
Certain modified amino acids used in vitamin synthesis fall under Chapter 29 heading 2936.
If diluted in water or solvents beyond transport allowances
Solutions exceeding chapter note (e) limits for safety/transport are classified as chemical preparations.
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Import Tips & Compliance
• Include USP certificate and chiral purity documentation (HPLC results) to confirm L-form classification
• For human supplement use, ensure FDA GRAS status and proper labeling; separate pharma shipments from feed grade
Related Products under HTS 2922.49.49
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.
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.