... ,paper making,medicine,analytical reagent,as well as refinement of sugar and electrolyte of metal zine,potassium salt,paint manufacturing and ... so on.Specification: ItemsHigh-purityContent(SrCO3),% ≥99.0Barium(Ba),% ≤0.03Calcium(Ca),% ≤0.03Iron(Fe),% ≤0.001Sulfate ... Production according to A grade standard of GB-10660-89. 99% min High Purity Strontium Carbonate In Powder