L-Histidine
L-Histidine essential amino acid for histamine production and metal chelation in supplements. HTS 2922.49.49 despite imidazole ring, classified by amino acid function. Used in allergy research and nutrition.
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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 isolated imidazole ring emphasis
Pure heterocyclic compounds without amino acid dominance in 2933.
If in blood plasma substitutes
Human blood-related products containing histidine in Chapter 30.
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Import Tips & Compliance
• Imidazole content doesn't trigger heterocyclic classification per chapter structure
• Chelate formation documentation for pharma applications
• Buffer properties require pKa declaration for research imports
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
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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.