|
Appearance
|
Colorless crystals
|
|
Assay
|
Min 99%
|
|
Substance insoluble in chloroform
|
Max 0.05%
|
|
Substance insoluble in HCl
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Arsenic (As)
|
Max 0.0005%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Lead (Pb)
|
Max 0.003%
|
|
Iron (Fe)
|
Max 0.002%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Potassium (K)
|
Max 0.01%
|