Vimedimex is a specializing in supplying Uncoated and Coated Calcium Carbonate of Vietnamese origin , Pure white Calcium Carbonate powder .1. Chemical compositions.Content of CaCo3: >98%Content of MgCo3: >0.03%Content of Fe2O3: >0.01%Content of SiO2: >0.03%Content of Al2O: >0.03%Ignition loss: >43.5%2.Physical properties.Whiteness: >98,5%Brightness:>95% Moisture: >0.5% Bulk density: 2.7g/cm3Oil absorption: >20g/100g CaCo3Hardness: 3Moh