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Assay (acidimetric): ≥ 98.0 %
Insoluble matter: ≤ 0.005 %
pH-value (5 %; water, 25 °C): 6.7 - 7.3
Chloride (Cl): ≤ 0.0005 %
Nitrate (NO₃): ≤ 0.001 %
Sulfate (SO₄): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.0002 %
Ca (Calcium): ≤ 0.001 %
Fe (Iron): ≤ 0.0002 %
Substances reducing potassium permanganate (as formic acid): ≤ 0.005 %
Residue on ignition (as sulfate): ≤ 0.01 %
Water: ≤ 2.0 %
Corresponds to ACS,Reag. Ph Eur
