Molecular Formula: NaCl; GR (AR) grade; CAS No.: 7647‐14‐5; Purity: >99.5%; Solubility in water: to past test; pH (50g/ml, 25oC): 5.0~8.0; Lead (Pb): max. 2ppm; Bromide(Br): max.0.01%; Iodide(I):max.0.005%; Hexacyanidoferrate(II)[Fe(CN)6]: max.1 ppm; Phosphate (P04):max.5ppm; Sulfate(SO4): max0.002%; Nitrogen compounds(as N): max0.001%; Potassium (K):max0.005%; Copper (Cu):max2ppm; Magnesium (Mg):max0.002%; Calcium (Ca):max0.002%;Barium(Ba): max0.001%; Lead(Pb): max2ppm,Iron (Fe):max.2ppm