|
Items |
Specification |
|
Appearance: |
White crystalline powder. |
|
Color and clarity of Solution: |
Transparency and colorless. |
|
pH value(in 1% solution): |
5.0-7.0 |
|
Specific rotation |
+176 to +182 |
|
Melting point: |
198-201 clsius degree |
|
Infrared characteristic peak value: |
1515cm-1 1220cm-1 1050cm-1 ±(5-8)cm-1 |
|
Loss on drying: |
Not more than 0.5% |
|
Residue on Ignition: |
Not more than 0.5% |
|
Heavy metals (Pb): |
Not more than 10ppm |
|
Arsenic: |
Not more than 2ppm |
|
Hydroquinone: |
Not more than 10ppm |
|
Assay (by HPLC): |
Not less than 99% |
|
Total of bacterium:
Fungus: |
Not more than 300/g
Not more than 50/g |
