Item

               Result

Anhydrous

Monohydrate

Assay (calculated as dry basis)

99.0-100.5%

99.0-100.5% 

PH (5%)

6.3-9.6

6.3-9.6 

Sulfate

≤0.06%

≤0.06%

Chloride

≤0.05%

≤0.05%

Heavy metals (As Pb)

≤0.0025%

≤0.0025%

Arsenic

≤0.0003%

≤0.0003%

Lead

≤0.001%

≤0.001%

Water

≤1.0%

≤7.0%

Fluorides 

≤0.005%

≤0.005%

Item

Result

Anhydrous

Monohydrate

Assay (calculated as dry basis)

98.0-100.5%

98.0-100.5%

PH (5%)

7.2-8.2

7.2-8.2

Sulfate

≤0.1%

≤0.1%

Chloride

≤0.05%

≤0.05%

Heavy metals (As Pb)

≤0.0025%

≤0.0025%

Arsenic

≤0.002%

≤0.002%

Magnesium and alkali salt

≤1.0%

≤7.0%

Barium

Qualified

Qualified

Water

≤1.0%

≤7.0%

Fluorides 

≤0.005%

≤0.005%