|
Appearance
|
Light green to gray crystalline powder
|
|
Assay
|
Min 97%
|
|
Acid insoluble matter
|
Max 0.02%
|
|
Sulphate (SO4)
|
Max 0.05%
|
|
Arsenic (As)
|
Max 0.0001%
|
|
Calcium (Ca)
|
Max 0.01%
|
|
Iron (Fe)
|
Max 0.005%
|
|
Lead (Pb)
|
Max 0.02%
|
|
Potassium (K)
|
Max 0.005%
|
|
Sodium (Na)
|
Max 0.05%
|