AMMONIUM CHLORIDE, LOW NITRATE, REAGENT (ACS) | Chemical Formula : NH!4Cl | CAS # : 12125-02-9 | Specifications : Assay 99.5 % - Min, Calcium 0.001 % , Heavy Metals (by ICP-OES) 0.0005 % , Insoluble 0.005 % , Iron 0.0002 % , Magnesium 0.0005 % , Nitrate 0.0001 % , pH of 5% solution @25C 4.5 - 5.5 pH, Phosphate 0.0002 % , Residue after ignition 0.01 % , Sulfate 0.002 %