Test item

Specification

Reagent grade

Pharmaceutical grade

Appearance

Conform

Conform

Assay /%

≥99.0

≥98.0

Clarify degrees test

Conform

Conform

Water insoluble/%

≤0.002

≤0.005

Chloride (Cl)/%

≤0.001

≤0.003

Sulfate (SO4)/%

≤0.005

≤0.005

phosphate (PO4)/%

≤0.0002

≤0.0005

Magnesium (Mg) /%

≤0.0002

≤0.0005

Aluminum  (Al)/%

≤0.0005

≤0.001

Calcium (Ca) /%

≤0.002

≤0.005

Ferric (Fe) /%

≤0.0002

≤0.0005

Copper (Cu) /%

≤0.0005

≤0.001

Lead (Pb)/%

≤0.0005

≤0.001

Reduction of potassium permanganate substances

≤0.01

≤0.02