Mn

≥43.5%

SO₄^2-

≤0.7% .

Cl

≤0.05%

Pb

≤0.05%

Insolubkle substance in HNO₃

≤0.03%

Mn

≥44%

SO₄^2-

≤0.5% .

Cl

≤0.05%

Pb

≤0.05%

Insolubkle substance in HNO₃

≤0.03%

Mn

≥44%

SO₄^2-

≤0.05% .

Cl

≤0.1%

Al

≤0.05%

K

≤0.02%

Na

≤0.03%

Ca

≤0.05%

Mg

≤0.03%

Pb                                           

≤0.02%