Appearance |
White or almost white crystalline powder, smellless and bitter taste |
Melting Point |
151-154°C |
Structural Formula |
|
Colour Reaction
|
Positive reaction
|
Comparative Spectrum
|
Retention time of the principal peak is identical with that of the comparative solution
|
Comparative spectrum
|
Infrared rays absorption spectrum is identical with comparative spectrum
|
Clarify of solution and colour
|
Be up to the standard
|
PH
|
5.0-7.0
|
Related substances
|
The area of total impurities' peak isn't more than the area of the comparative solution's principal peak
|
Loss on drying
|
≤0.5%
|
Residue on ignition
|
≤0.1%
|
Heavy Metals
|
≤20ppm
|
Assay (HPLC)
|
98.0%-102.0%
|
Microbial Limit Tests
|
Conforms
|
Packing
|
25kgs or 20kgs/paper drum
|
Usage
|
Improve ideation and memory, used to cure memory and ideation regression caused by cerebral arteriosclerosis and cerebrovascular accidents
|