|
Items |
Specification |
|
Appearance: |
White or practically white crystalline powder |
|
Identification: |
Complies with the standard |
|
Solubility: |
Soluble in water |
|
Melting point: |
258 to 265 Celsius degree |
|
Residue on ignition: |
Not more than 0.5% |
|
Specific rotation: |
-90 to -100 |
|
pH value (5% solution): |
4.5-6.5 |
|
Loss on drying: |
Not more than 1.0% |
|
Sulfated ash: |
Not more than 1.0% |
|
Heavy metals: |
Not more than 10ppm |
|
Absorption(50ug in 1ml water at 289nm): |
79.6-86.2 |
|
Total Impurities:
Single impurity: |
Not more than 1.0%
Not more than 0.5% |
|
Alkaloid: |
Complies with the standard |
|
Assay (HPLC): |
Not less than 98.5% |
