Theanine is characterised by high purity (98–102%) and low moisture content. It is a microbiologically safe product and complies with heavy metal standards.
| Parameter |
Value |
| Appearance |
White, crystalline powder |
| Odour and taste |
Typical for plant material |
| Solubility |
Soluble in water, colourless, clear solution |
| Moisture content |
≤ 0.5% |
| Ash content |
≤ 0.2% |
| pH |
5.0 – 6.0 |
| Melting point |
202–215°C |
| Chlorides |
≤ 0.02% |
| Optical rotation |
+7.7 to +8.5° |
| Assay (purity) |
98% – 102% |
| Salmonella / E. coli |
Absent |
| Number of microorganisms |
≤ 1000 cfu/g |
| Yeast and mould |
≤ 100 cfu/g |
| Heavy metals (Pb, Cd, Hg, As) |
In accordance with the standard (As ≤ 4 ppm, Cd ≤ 1 ppm, Pb ≤ 1 ppm, Hg ≤ 0.1 ppm) |