L-theanine
City: LV, Marupe
Please avoid sudden changes in temperature and humidity, as they may affect the condition of derivative ingredients and tablets.
The shelf life begins from the date of manufacture at the factory.
Taking into account logistical and transportation stages, the remaining shelf life of the product is always shorter than the full shelf life.
We ship products to our customers with a remaining shelf life of no less than 70%.
Physical & Chemical Characteristics
Analysis Item | Specification |
Appearance | White crystals or crystalline powder |
Assay (on dried basis) | 98.0%–102.0% |
Loss on Drying | ≤1.0% |
Residue on Ignition | ≤0.2% |
Clarity of Solution | Clear and colorless |
Specific Rotation [α]ᴰ²⁰ | +7.7°–+8.5° |
pH | 4.5–6.0 |
Chloride | ≤0.02>#/p### |
Heavy Metals
Analysis Item | Specification |
Heavy Metals | ≤10 ppm |
Lead (Pb) | ≤3 ppm |
Arsenic (As) | ≤1 ppm |
Cadmium (Cd) | ≤1 ppm |
Mercury (Hg) | ≤0.1 ppm |
Microbiological
Analysis Item | Specification |
Total Plate Count | ≤1000 cfu/g |
Total Yeast & Mold | ≤100 cfu/g |
Escherichia Coli | Negative |
Salmonella | Negative |