Sourcing L-tryptophan?
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L-isoleucine
nutritional supplement and flavoring agent
Sourcing L-tryptophan?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
L-tryptophan is an essential amino acid involved in protein biosynthesis. It serves as a metabolic precursor to key biomolecules such as serotonin, melatonin, and vitamin B3.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
The international HS code for L-tryptophan (CAS 73-22-3) is 2933.99.
2933.99
2933 99 80
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
(2S)-2-amino-3-(1H-indol-3-yl)propanoic acid
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