Item

Standard

Analysis data

Appearance

White crystalline powder

conforms

State of solution
(Transmittance)

Clear and colorless not less than 98.0%

98.2%

Chloride (Cl)

Not more than 0.02%

<0.02%   

Ammonium (NH4)

Not more than 0.02%

<0.02%

Iron (Fe)

Not more than 10ppm

<10ppm

Heavy metal(Pb)

Not more than 10ppm

<10ppm

Arsenic(As2O3)

Not more than 1ppm

<1ppm

Loss on drying

Not more than 0.20%

0.10%

Residue on ignition(sulfated)

Not more than 0.10%

0.09%

Assay

98.5% to 101.0%

99.3%

pH

5.5 to 7.0

5.9

Conclusion

Product is according with standard.