L-Histidine
L-Histidine is an imidazole-ring aromatic amino acid under oxygen-function amino-compounds in HTS 2922.49.30.00 per additional U.S. note 3. Used in cell culture media and antihistamine precursors.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ring nitrogen emphasized
Certain heterocyclic compounds with nitrogen may fall under heading 2933 if not purely amino-acid.
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Import Tips & Compliance
• Declare stereochemistry accurately; ensure stabilizer additives comply with chapter note 1(f)
• Common issue: confusion with organo-inorganic under 2931
Related Products under HTS 2922.49.30.00
DL-Phenylalanine
DL-Phenylalanine is an aromatic amino acid with a single carboxylic acid oxygen function, classified under HTS 2922.49.30.00 as it falls within additional U.S. note 3 to section VI for specific oxygen-function amino-compounds. It is used in nutritional supplements and pharmaceutical intermediates.
L-Tyrosine
L-Tyrosine is a para-hydroxyphenyl derivative of phenylalanine, an aromatic amino acid with amino-acid oxygen function, covered by HTS 2922.49.30.00 under additional U.S. note 3. It serves as a precursor for neurotransmitters and thyroid hormones.
DL-Tryptophan
DL-Tryptophan, an indole-containing aromatic amino acid with single oxygen function, is specified in additional U.S. note 3 to section VI, fitting HTS 2922.49.30.00. It is essential for serotonin synthesis in supplements.
L-Phenylalanine Ethyl Ester Hydrochloride
This ester salt of phenylalanine is an aromatic derivative with amino-acid oxygen function, classified in HTS 2922.49.30.00 as per additional U.S. note 3 and chapter note 3(A). Used in peptide synthesis.
Tyrosine Methyl Ester
Tyrosine methyl ester, an ester of the aromatic amino-acid tyrosine, fits HTS 2922.49.30.00 under additional U.S. note 3 for section VI. Primarily for synthetic chemistry applications.
Tryptophan Sodium Salt
Sodium salt of tryptophan, an aromatic amino-acid salt with single oxygen function, covered by HTS 2922.49.30.00 and chapter note 3(C)(1). Used in pharmaceutical formulations.