|
Test item
|
Specification
|
|
|
|
Reagent grade
|
Pharmaceutical grade
|
|
Appearance
|
Conform
|
Conform
|
|
Assay [KH2PO4]/%
|
≥99.5
|
≥99.0
|
|
Clarify degrees test
|
Conform
|
Conform
|
|
Water insoluble/%
|
≤0.002
|
≤0.005
|
|
Dry weightlessness /%
|
≤0.2
|
≤0.3
|
|
Chloride (Cl)/%
|
≤0.001
|
≤0.005
|
|
Sulfate (SO4)/%
|
≤0.003
|
≤0.005
|
|
N/%
|
≤0.001
|
≤0.002
|
|
Sodium (Na)/%
|
≤0.02
|
≤0.05
|
|
Ferric (Fe)/%
|
≤0.001
|
≤0.005
|
|
Arsenic (As) /%
|
≤0.0005
|
≤0.002
|
|
Heavy metal (Pb)/%
|
≤0.001
|
≤0.005
|
