Item

Standard

Analysis data

Appearance

White powder

Conforms

State of solution
(Transmittance)

Not less than 95.0%

98.7%

Chloride (Cl)

Not more than0.04%

<0.04%

Heavy metal(Pb)

Not more than 10ppm

<10ppm

Arsenic(As2O3)

Not more than 2ppm

<1ppm

Loss on drying 

Not more than 0.20%

0.10%

Residue on ignition(sulfated)

Not more than 0.20%

0.08%

Assay

98.0 to101.0%

99.3%

Conclusion

The product meets the standard.