Loss on Drying:13.0-15.0%Solubility:Soluble in 3 parts waterInsoluble Material:≤0.01%Heavy Metals:≤ 0.0005% (as Pb)Sulfur Compounds:≤0.004% (as SO4)Chloride (Cl-):≤ 0.001%Phosphate (PO43-):≤0.0005%Iron (Fe):≤0.0005%Silica (SiO2):≤0.005%Calcium (Ca):≤0.03%Magnesium (Mg):≤0.005%Potassium (K):≤0.005%Storage and Stability:Store at RT. Stable for 6 months after receipt.Meets or exceeds ACS Specifications