Hello my dear customer, Good day to you My name is Clover from Kego Company Limited which is a reliable supplier of Ground Calcium Carbonate. It is being increasingly used in many applications such as: paper, paint, plastics, ceramic, crystal, animal feed, medicine, food production. Follows are specification of our products for your information: Physical Analysis Chemical Analysis Whiteness: 98% min CaCO3: 99.46% min Brightness: 96% min Fe2CO3: 0.01% max Hardness: 3 Moh MgO: 0.02% max Moisture: 0.2% SiO2: 0.03% max Oil absorption: 23g/100g CaCO3Al2O3: 0.02% max Density: 2.65-2.7g/cm3 pH: 8-9 Any of your order will be paid our best attention. For detailed information, please feel free to contact me via our information below: