Calcium Carbonate CAS NO 471-34-1 Chemical Formula CaCo3 Appearance Odourless white powder or crystals, tasteless. Practically insoluble in water. Grade B.P/USP/LR/AR Packing 50 Kgs Double sea worthy PP bags with Liners. or 25 Kgs Fibre drums with liner and PP bags Nature Exists in nature as the minerals aragonite, calcite and vaterite Uses Source of Lime, neutralizing agent; filter and extender in rubber, plastics, paints; opacifying agent in paper; fortification of bread; putty; tooth powders; antacids; whitewash; Portland Cement; So2 removal from stack gases; metallurgical flux; analytical chemistry; Co2 generation.