L-leucine is an essential amino acid required for protein biosynthesis. It cannot be synthesized by the human body and must be obtained from the diet, where it also serves as a nutritional supplement and flavoring agent.
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.
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Phenylalanine
nutritional supplement and flavoring agent
L-isoleucine
nutritional supplement and flavoring agent
L-serine zwitterion
nutritional supplement and flavoring agent
L-tyrosine
nutritional supplement and flavoring agent
Potassium citrate monohydrate
Sequestrant, emulsifier, and stabilizer
Dipotassium succinate trihydrate
food additive and buffering agent
L(+)-Monosodium glutamate monohydrate
flavor enhancer
Sodium acetate trihydrate
buffering agent and food acidulant
The international HS code for L-leucine (CAS 61-90-5) is 2922.49.
2922.49
2922 49 85
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-4-methylpentanoic acid
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Sourcing L-leucine?
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