|
Appearance
|
White crystalline powder
|
|
Assay
|
99 - 102%
|
|
Insoluble matter
|
Max 0.005%
|
|
pH (5% solution in water)
|
3.0 - 6.0
|
|
Total nitrogen (N)
|
Max 0.0005%
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Arsenic (As)
|
Max 0.00005%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Copper (Cu)
|
Max 0.001%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Lead (Pb)
|
Max 0.002%
|
|
Sodium (Na)
|
Max 0.005%
|
|
Zinc (Zn)
|
Max 0.005%
|