Test item
|
Specification
|
|
Reagent grade
|
Pharmaceutical grade
|
|
Appearance
|
Conform
|
Conform
|
Assay /%
|
≥99.0
|
≥98.0
|
Clarify degrees test
|
Conform
|
Conform
|
Water insoluble/%
|
≤0.005
|
≤0.01
|
Chloride (Cl)/%
|
≤0.001
|
≤0.003
|
Sulfate (SO4)/%
|
≤0.01
|
≤0.03
|
Nitrogen compounds (N)/%
|
≤0.002
|
≤0.003
|
Potassium (K) /%
|
≤0.01
|
≤0.1
|
Ferric (Fe)/%
|
≤0.0005
|
≤0.001
|
Arsenic (As) /%
|
≤0.0005
|
≤0.002
|
Heavy metal(Pb)/%
|
≤0.0005
|
≤0.001
|