we offer Sodium Arsenate. CERTIFICATE OF ANALYSIS MATERIAL : SODIUM ARSENATE FORMULA : Na2 HAsO4. 7 H20 APPEARANCE : COLORLESS TO WHITE CRYSTALS MOLECULAR WEIGHT : 312.01 ASSAY : 98% MIN MAXIMUM IMPURITIES: Insoluble Matter : 0.05% Arsenite (As2O3) : 0.01% Chloride (Cl) : 0.01% Nitrate (NO3) : 0.005% Sulfate (SO4) : 0.01% Heavy Metals (as Pb) : 0.02% Iron (Fe) : 0.01% ALL THESE TESTS ARE ANALYSES AT OUR OWN LABORATORY PARESH PRAJAPATI CELL NO +91-99250-03910 DIMPLE