high purity:90.0%min Molecular Weight: 1114.95 Chemical Form: MnCO3 Content (MnCO3),% ≥90.0Mn,% ≥43.0Manganese sulfate,% ≤0.5Chloride(Cl) ,% ≤0.02Alkaline metal and alkali earth metal,% ≤0.25Nitric acid insoluble substance,% ≤0.05Heavy metal(Pb) ,% ≤0.05 Manganese Carbonate