Item:

Specification

Assay:

≥98.0%

Insolubles in hydrochloric acid：

≤0.008%

Sulfate:

≤0.01%

Alkali mtals and alkalie-earth metals:

≤0.1%

Fe:

≤0.01%

As:

≤0.0002%

Pb:

≤0.02%

Cu:

≤0.001%