Specification: 99%
Assay: COA
|
Item
|
Specification
|
Result
|
|
Appearance
|
White crystalline powder
|
White crystalline powder
|
|
Assay Theanine
|
≥98%
|
99.38 %
|
|
Specific Rotation [α]D20 (C=1,H2O)
|
+7.0° to 8.5°
|
+8.2°
|
|
Chloride (Cl)
|
≤0.02 %
|
0.0001%
|
|
Sulphated
|
Not more than 0.015%
|
0.0004%
|
|
Transmittance
|
Not less than 90.0%
|
Conforms
|
|
Melting Point
|
202~215oC
|
210~211 oC
|
|
Solubility
|
Clear colorless
|
Conforms
|
|
Heavy Metals (Pb)
|
≤10ppm
|
Conforms
|
|
Arsenic (As2O3)
|
≤1ppm
|
Conforms
|
|
Residue on Ignition
|
≤0.2 %
|
0.05%
|
|
Loss on Drying
|
≤0.5 %
|
0.16%
|
|
PH
|
4.0 to 7.0(1%,H2O)
|
5.55
|
|
Conclusion
|
Conform with JP2005 Standard
|
|
Storage
|
25℃
|