N(5)-ethyl-L-glutamine is a N5-alkylglutamine where the alkyl group is ethyl.
How much products actually contain
No product states its amount yet.
Of the products containing it, 1 list it before the 1% line and 10 after it (usually 1% or less).
Products using this ingredient
11 of 11 confirmed · likeliest to carry enough first
WishtrendGreen Tea & Enzyme Powder Wash
Happy BathSweet Sleep Milky Mist Milky Lavender Scent 150ml
KlairsSupple Preparation Unscented Toner
KlairsSupple Preparation Facial Toner
Happy BathSweet Sleep Souffle Lotion Milky Lavender Scent 500g
JM solutionJM solution 3D Luminous Rose PDRN Whitening Mask (Foil)
Happy BathSweet Sleep Aurora Wash Milky Lavender Scent 500g
JM solutionJM solution 3D Luminous Salmon PDRN Firming Mask
JM solutionJM solution Honey Luminous Royal Propolis Mask EX
JM solutionJM solution Water Luminous S.O.S Ringer Mask EX
KlairsRich Moist Soothing Cream
Definition
N(5)-ethyl-L-glutamine is a N5-alkylglutamine where the alkyl group is ethyl. It has been isolated from green tea. It has a role as a geroprotector, a neuroprotective agent and a plant metabolite. It is a tautomer of a N(5)-ethyl-L-glutamine zwitterion.
Source: PubChem
US FDA substance register · UNII 8021PR16QO · registered name THEANINE · single chemical substance
Cosmetic roles
Safety & regulatory references
Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name テアニン: 本品は、次の化学式で表されるアミノ酸である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 3081-61-6
- EC No.EU chemical inventory number
- 221-379-0
- DTXSIDUS EPA chemical ID
- DTXSID80184817
- DTXCIDUS EPA compound ID
- DTXCID20107308
- IUPAC
- N-Ethyl-L-glutamine
- Molecular formula
- C7H14N2O3
- Molecular weight
- 174.2 g/mol
Measured properties
- Colour
- white
- Odour
- odourless
- Water solubility
- 25670 ㎎/ℓ
- n-Octanol/water partition coefficient (Kow)
- -3.54
- Molecular weight
- 174.20
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: KOSHA safety data sheets (Korea)
What products actually use it for
What the 3 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Softener and conditioner2
- Humectant1
Source: US EPA CompTox dashboard
Related literature
- Preparation and characterization of L-theanine-loaded dissolving microneedles · 2026
- Anti-Melanogenic Effects of L-Theanine on B16F10 Cells and Zebrafish · 2025
- Effect of L-theanine in the prevention of 2,4- dinitrochlorobenzene induced atopic dermatitis: A study in BALB/c mice model · 2025
- A Comprehensive Review of l-Theanine Production in Escherichia coli: The Recent Progress, Metabolic Engineering Strategies, and Future Prospects. · 2025
- Preparation of Transdermal Gel Containing l-Theanine for the Potential Treatment of Premenstrual Syndrome: A Preclinical Study · 2024
Linked databases 16
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- PubChem
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata 2