high purity:99.0%min CAS No.: 7759-02-6 Molecular Weight: 183 Chemical Form: SrSO4 Content (SrSO4),% ≥99.0Barium sulfate (BaSO4),% ≤0.1Calcium sulfate(CaSO4),% ≤0.08Calcium oxide(CaO),% ≤0.05Ferrum (Fe) ,% ≤0.01Chloride (Cl) ,% ≤0.01Sodium (Na) ,% ≤0.008Potassium (K) ,% ≤0.005 strontium sulfate