ITEMS |
Specifications |
Appearance |
White crystals or crystalline powder |
Assay. % |
98.5~101.5 |
Identification |
Positive |
Transmittance, % |
>=98 |
pH |
5.5~6.5 |
Heavy metal(as Pb),ppm |
=<20 |
Loss on drying, % |
=<0.20 |
Residue on ignition, % |
=<0.1 |
Chioride(as Cl), % |
=<0.007 |
Sulphate(as SO4), % |
=<0.0065 |
Iron(as Fe), % |
=<10 |
Pb ppm |
=<1 |
Ammonium(as NH4), % |
=<0.01 |
Arsenic(as As) ppm |
=<1 |
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