UPAC Name Potassium carbonate Chemical formula K2CO3 CAS Number 584-08-7 EC Number 209-529-3 Potassium Carbonate, % 99.5% min Chloride (KCL), % 0.014% Sulfate (K2SO4), % 0.007% Ferric (Fe), % 0.0007% Water Insoluble, % 0.009% Heavy Metal (as Lead), mg/kg 8 Arsenic (As), mg/kg 1 Loss on drying, % 0.38% Appearance White Crystal/Granular