Sodium carbonate (light) Total alkali content: -----------------------------99.2%min Chlorides (NaCl): --------------------------------0.7%max Sulphate (SO4): ----------------------------------0.03%max Iron (Fe2O3):--------------------------------------0.04%max Water insoluble matter: --------------------------0.04%max Ignition loss: --------------------------------------0.80%max Sodium carbonate (Dense) Total alkali content: -----------------------------99.2%min Chlorides (NaCl): --------------------------------0.7%max Sulphate (SO4): ----------------------------------0.03%max Iron (Fe2O3):--------------------------------------0.04%max Water insoluble matter: --------------------------0.04%max Ignition loss: --------------------------------------0.80%max Bulk Density: --------------------------------------0.9g/ml min Particle Size: --------------------------------------