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
Payment
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