... :Chemical & Physical Analysis:CHEMICAL CONTENTSPHYSICAL SPECIFICATIONS CaCO3 content99.46%Whiteness grade 1,2,3,4,5,6,7,8,9,12 ... ,15,16≥97%MgO0.08%Brightness≥95%Fe2O30.02%Whiteness grade 9,10,11>94%Al2O30.03%Moisture contents0.2%SiO20 ... your demands of Quantity, Quality, Appearance, Price and Service. Calcium Carbide Powder