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Synonyms:N-Ethyl-L-glutamine; L-Glutamic acid gamma-(ethylamide)

Molecular Structure:

Molecular Formula:C7H14N2O3

Molecular Weight:174.20

CAS Registry Number:3081-61-6


Theanine (pronounced /ˌtea-anene/) (gamma-glutamylethylamide, or 5-N-ethyl-glutamine) is an glutamic acid analog or amino acid derivative commonly found in tea (infusions of Camellia sinensis), and also in the basidiomycete mushroom Boletus badius. In 1950 the Tea laboratory of Kyoto successfully separated theanine from Gyokuro leaf, which has the highest theanine content among all teas. Theanine is an analog to glutamine and glutamate, and can cross the blood-brain barrier. It is sold in the US as a dietary supplement and is FDA confirmed as GRAS. The Japanese Ministry of Health and Welfare approved the use of L-theanine in 1964
Items Specifications
Appearance White crystalline powder
Clarity of Solution Conforms
Specific Rotation +7.7~+8.5.
Residue on Ignition 0.2% Max
Heavy Metals 10ppm Max
Arsenic 1ppm Max
Chloride 0.02% Max
PH 5.0-6.0
Loss on Drying 0.5% Max
Assay(By HPLC) 99.0% Min
Salmonella Negative
E.coli Negative
Staphylococcus Negative
Mold & Yeast 100cfu/g Max
Total Plate 1000cfu/g Max



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