... Purity: 99.0%min Quality ... 0.0005≤0.001Arsenic (As),%≤0.0001---Ba,%conform---Fe,%≤0.001---Oxalates,%≤0.05≤0.03Sulphates,%≤0.03≤0.015Calcium,conform---Chlorides,%≤0.01≤0.005Easy carbonify substance,conformconformLoss on ... drying,%---10.0-13.0 ...