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.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 6.5% | +25.0% | 31.5% |
| 🇲🇽Mexico | 6.5% | — | 6.5% |
| 🇨🇦Canada | 6.5% | — | 6.5% |
| 🇩🇪Germany | 6.5% | — | 6.5% |
| 🇯🇵Japan | 6.5% | — | 6.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered alkaloid derivative
Indole structure may shift to heading 2939 for certain natural product derivatives.
If imported as carboxamide salt
Salts of carboxylic acid amides classified with base or acid per note 3(C).
Not sure which classification is right?
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Import Tips & Compliance
• Include COA confirming no impurities exceeding chapter limits; subject to FDA import alerts for purity
• Pitfall: classifying racemic form as separate from L-form
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.
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.
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.