|
Test item
|
Specification
|
|
|
Reagent grade
|
Pharmaceutical grade
|
|
|
Appearance
|
Conform
|
Conform
|
|
Assay /%
|
≥98.5 -100.0
|
≥98.5-100.0
|
|
Water insoluble/%
|
≤0.005
|
≤0.02
|
|
Chloride (Cl)/%
|
≤0.001
|
≤0.002
|
|
Nitrate (NO3)/%
|
≤0.001
|
≤0.002
|
|
Phosphate (PO4)/%
|
≤0.00025
|
≤0.0005
|
|
Arsenic (As) /%
|
≤0.00005
|
≤0.0001
|
|
Calcium (Ca) /%
|
≤0.0025
|
≤0.005
|
|
Ferric (Fe) /%
|
≤0.0002
|
≤0.0006
|
|
Magnesium (Mg) /%
|
≤0.0004
|
≤0.0012
|
|
Heavy metal (Pb) /%
|
≤0.0005
|
≤0.0005
|
|
Silicate and chlorine water sediment
|
≤0.01
|
≤0.02
|
