Test item

Specification

Reagent grade

Pharmaceutical grade

Appearance

Conform

Conform

Assay /%

>= 99.0-101.0

>= 98.0-101.0

Water insoluble /%

<= 0.005

<= 0.02

Chloride (Cl)/%

<=0.001

<= 0.005

  N/%

<= 0.001

Phosphate  (PO₄)/%

<= 0.0005

<= 0.002

Arsenic  (As)/%

<= 0.0002

<= 0.0002

Manganese  (Mn)/%

<= 0.05

Ferric (Fe)/%

<= 0.02

<= 0.10

Copper (Cu)/%

<= 0.002

<= 0.01

Zinc (Zn)/%

<= 0.005

<= 0.02

Lead (Pb)/%

<= 0.002

<= 0.005

Ammonia not sediment /%

<= 0.05

<= 0.2