Item

Standard

Analysis data

Appearance

White powder

conforms

State of Solution (Transmittance)

Not less than 95.0%

97.0%

Chloride (Cl)

Not more than0.02%

<0.008%

Heavy metal(Pb)

Not more than 15ppm

<15ppm

Arsenic(As2O3)

Not more than 2ppm

<2ppm

Loss on drying

Not more than 0.20%

0.18%

Residue on ignition(sulfated)

Not more than 0.20%

0.1%

Assay

98.0 to101.0%

98.5%