Items

Standard

Analysis data

Appearance

White crystalline powder

Conforms

Melting Point(oC)

180.0 to 182.0oC

181℃

Transmittance

Not less than 98.0%

98.2%

Chloride(C1)

Not more than0.02%

0.018%

Ammonium(NH4)

Not more than0.02%

Conforms

Sulfate(SO4)

Not more than 0.02%

0.01%

Heavy metals(Pb)

Not more than 10ppm

Conforms

Iron(Fe)

Not more than 10ppm

7ppm

Arsenic(As2O3)

Not more than 1ppm

Conforms

Loss on drying

Not more than 0.50%

0.11%

Residue on ignition

Not more than0.1%

Conforms

Assay

98.0-101.0%

99.0%