It's widely used in lithium bromide, Li-ion battery, electrolytic aluminum, glass-ceramics, lithium metal etc. Detailed specs: 1) Li2CO3: ≥ 99.0%2) SO4: ≤ 0.35%3) CaO: ≤ 0.005%4) H2O: ≤ 0.60%5) Fe2O3: ≤ 0.008%6) Na2O: ≤ 0.20%7) Cl: ≤ 0.005%8) Insoluble matters in HCL: ≤ 0.015%