Description Calcium Carbonate, ACS, 99+%, 500g For Research & Development Not for drug, clinical use in humans, for food or food additive use Certificate of Analysis:Appearance (Color) WhiteAppearance (Form) PowderAssay 99+% Insoluble in Dilute Hydrochloric Acid <0.01% Ammonium Hydroxide Ppt. <0.01% Water Soluble Titrable Base <0.002 meq/g Chloride (Cl) <0.001% Fluoride (F) <0.0015% Oxidizing Substances (as NO3) <0.002% Copper (Cu) <0.01% Sulfate (SO4) <0.01% Ammonium (NH4) <0.003% Barium (Ba) <0.005% Heavy Metals (as Pb) <0.001% Iron (Fe) <0.003% Magnesium (Mg) <0.02% Potassium (K) <0.01% Sodium (Na) <0.1% Strontium (Sr) <0.1% CAS: 471-34-1 FORMULA: CaCO3