DL-Tryptophan
DL-Tryptophan is a racemic mixture of the aromatic amino acid tryptophan, containing an indole ring and a single carboxylic acid oxygen function. It is a separate chemically defined organic compound classified under heading 29.22. The mixture of isomers is covered by Chapter note 1(b).
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 the indole ring is considered the predominant feature
Heterocyclic compounds with nitrogen may fall in Chapter 29, heading 29.33, but note 3 to Chapter 29 would apply.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify the product is not a peptide
• Provide the CAS number and purity certificate
• If imported as a supplement, check Natural Health Product regulations
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