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Item

Index

  Standard value

Resuit of inspection

content (%)                    

99.5 ~100.5

99.7

Light  transmittance (%)        

0.05

0.1

Readily carbonizable substance 

1.0

o.2

Iron (Fe)content (mg/kg)          

5 .0

5 .0

sulfate(take SO₄)content(%)     

0.05

0.05

Loss on dry                     

2.0

2.0

Arsenic(As)content (mg/kg)      

0.005

0.008

chlorides(CL)content (%)         

0.005

0.005

Oxalate                       

0.01

0.01

Calcium salt(%)                

0.02

0.02

Lead(mg/kg)                   

0.5

0.5