... (Ba),% ≤0.03Calcium(Ca),% ≤0.03Iron(Fe),% ≤0.001Sulfate(SO4),% ≤0.01Moisture,% ≤0.2Chloride(Cl),% ≤0.002Pb,% ≤0.0005Mg,% ≤0.001Average granular size:1.84um Production according to A ... grade standard of GB-10660-89. 99% min High Purity Strontium Carbonate In ...