What Is L-Theanine Powder 20/98/99% (Tea Extract, )? Applications, Dosage, Alternatives & Specifications
Last updated: 2026-11-14 · CAS 3081-61-6 · Food/Feed Grade
- Quick facts
- Name
- L-Theanine Powder 20/98/99% (Tea Extract, )
- CAS number
- 3081-61-6
- Grade
- Food/Feed Grade
- Certifications
- ISO 9001 · ISO 22000 · HACCP · FAMI-QS · Kosher · Halal · GMP · SGS
- Application areas
- 3
- Documentation
- COA · TDS · SDS
Overview
L-Theanine (CAS No.: 3081–61–6) is a naturally occurring non-protein amino acid, chemically known as N-ethyl-γ-glutamine, with molecular formula C7H14N2O3 and molecular weight 174.20. First isolated from Gyokuro green tea by Japanese researchers, L-Theanine is a characteristic amino acid of Camellia sinensis, accounting for approximately 60% to 70% of total free amino acids in tea leaves and 1% to 2% of dry tea weight. L-Theanine imparts the savory, sweet taste unique to tea and is an important indicator of tea quality. L-Theanine appears as white crystalline powder, odorless, with a slightly sweet distinctive taste, soluble in water, with a decomposition temperature of 214–215°C. L-Theanine can cross the blood-brain barrier and functions by modulating neurotransmitter levels including GABA, dopamine, and serotonin, promoting alpha brain wave activity to induce a state of "relaxed alertness" without causing drowsiness. Medical research has confirmed that L-Theanine effectively reduces stress and anxiety without causing drowsiness. Most people feel its effects within 30–60 minutes of consumption, with effects lasting 8 to 12 hours.
As a single chemical entity, L-Theanine's efficacy primarily stems from its precise regulation of neurotransmitter systems. Once ingested, L-Theanine crosses the blood-brain barrier and acts through the following mechanisms:
GABA Modulation: L-Theanine enhances GABA activity, promoting natural calm and relaxation.
Applications
Food & Beverage
L-Theanine is a core ingredient in functional beverages and RTD teas. Its well-documented synergy with caffeine—mitigating caffeine's stimulatory…
Dietary Supplements
L-Theanine is a core functional ingredient in the global market for stress management and cognitive enhancement. Key benefits include:
Cosmetics and Personal Care
L-Theanine is used in skincare products as a soothing agent and antioxidant, helping protect skin cells from oxidative stress damage. 4.4…
Specification
| Specification Range/Index | Test Method | |
|---|---|---|
| Appearance | White to off-white crystalline powder | Visual inspection |
| Content (on dry basis) | 98.5% – 101.5% | HPLC |
| Specific Rotation | +7.0° to +9.0° (c=5, H2O) | Polarimetry |
| Loss on Drying | ≤1.5% | Thermogravimetric method |
| Residue on Ignition | ≤0.1% | High-temperature ignition |
| pH (5% aqueous solution) | 4.5 – 6.0 | pH meter |
| Chlorides (as Cl) | ≤0.02% | Turbidimetric method |
| Sulfates (as SO42−) | ≤0.02% | Turbidimetric method |
| Lead (Pb) | ≤0.5 mg/kg | ICP-MS/AAS |
| Arsenic (As) | ≤0.5 mg/kg | ICP-MS/AAS |
| Cadmium (Cd) | ≤0.2 mg/kg | ICP-MS/AAS |
| Mercury (Hg) | ≤0.2 mg/kg | ICP-MS/AAS |
| Total Aerobic Microbial Count | ≤1000 CFU/g | Plate count method |
| Yeasts & Molds | ≤100 CFU/g | Plate count method |
| E. coli | Not detected | Culture method |
| Salmonella (25g) | Not detected | Culture method |
| Packaging Specifications | 1 kg/bag, 5 kg/bag, 25 kg/drum | — |
| Shelf Life | 24 months | — |
| 4. Product Application Fields |
Packaging & Storage
- Packing: 25kg net fiber drum with double PE liner.
- Sample: 100-500g free sample available.
- Storage: Keep in tightly closed packaging, cool, dry, well-ventilated. Protect from light and moisture.
- Shelf Life: 24 months from production date.
Quality & Certifications
Every batch tested by in-house QC lab. COA, TDS, SDS provided with each shipment.
Regulatory & Compliance
EU
Complies with EU regulations and FAMI-QS standards.
USA
Meets FDA and AAFCO requirements.
China
Registered under Chinese MOA regulations.
International
Kosher, Halal, ISO certified. FTA forms available.
Safety & Handling
- Hazard Class: Generally non-hazardous. Refer to SDS for details.
- Storage: Room temperature, dry, sealed. Avoid strong oxidizers.
- Transport: Non-dangerous goods. Standard sea/air freight.
- SDS: Available on request at sales@xadditive.cn.
Frequently asked questions
MOQ?
MOQ is 1kg for trial, 25kg for regular orders. Free samples available.
Shelf life?
24 months from production date when stored properly.
Certifications?
ISO 9001, ISO 22000, HACCP, FAMI-QS, Kosher, Halal, COA, SDS, TDS.
How to get quote?
Email sales@xadditive.cn with your requirement. Reply within 30 minutes.
Request a quote & COA
Ask for the current specification sheet, a COA sample and a bulk quotation — reply within 30 minutes on working days.