|
Item |
Specification |
|
Appearance |
Almost white to light yellow crystalline powder |
|
Assay(On dried basis) |
≥98.0% |
|
Clarity of solution |
Clear or opacity not more than reference suspension |
|
Fluoride |
≥5.0% |
|
Related substances |
The spots obtained from the test solution are not more than three, and not more intensely than the principle spot obtained from the standard solution |
|
Loss on drying |
≤2.0%(105ºC) |
|
Residue on ignition |
≤0.2% |
|
Heavy metals |
≤20ppm |