SODIUM TARTRATE, DIHYDRATE, REAGENT (ACS) | Chemical Formula : Na!2C!4H!4O!6.2H!2O | CAS # : 6106-24-7 | Specifications : Ammonium 0.003 % , Assay 99.0 - 101.0 %, Calcium 0.01 % , Chloride 0.0005 % , Heavy metals (as Pb) 0.0005 % , Insoluble Matter 0.005 % , Iron 0.001 % , Loss on drying @ 150 C 15.61 - 15.71 %, pH of 5% solution @ 25 C 7.0 - 9.0 pH, Phosphate 0.0005 % , Sulfate 0.005 %