|
Test |
Requirement |
Result |
|
Identifications |
||
|
Solubility in water |
Freely soluble |
Freely soluble |
|
Solubility in ethanol |
Slightly soluble |
Slightly soluble |
|
Ultraviolet absorption |
227+2nm |
227nm |
|
Test for potassium |
Positive |
Positive |
|
Precipitation test |
Yellow precipitate |
Yellow precipitate |
|
Assay(Titration method) |
99.0-101.0% |
99.0-101.0% |
|
PH(1% solution) |
6.5-7.5 |
6.5-7.5 |
|
Purity |
||
|
Loss on drying(105°C,2h) |
≤1.0%(105°C,2 hours) |
less then1.0% |
|
Organic impurities(HPLC) |
≤20mg/kg |
less then 20mg/kg |
|
Impurity A |
≤0.125% |
less then 0.125% |
|
Impurity B |
≤20mg/kg |
less then 20mg/kg |
|
Fluoride |
≤3mg/kg |
1.00mg/kg |
|
Heavy Metals |
≤5mg/kg |
1.5mg/kg |
|
Lead |
≤1mg/kg |
0.05mg/kg |
|
Arsenic |
≤3mg/kg |
0.15mg/kg |
|
Selenium |
≤30mg/kg |
0.25mg/kg |
|
Hg |
≤0.03mg/kg |
0.0003mg/kg |
|
Sulfate |
≤0.1% |
less then0.1% |
|
Cadmium |
Not found |
|
|
chrome |
Not found |
|
|
Nickel |
Not found |
|
