... Light; Calcium Carbonate Heavy; Biological Calcium Carbonate; Oyster Shell PowderCAS NO: 471-34-1EINECS Number: 207-439-9Molecular formula: CaCO3MW: 100.09InChI ... , calcium, toothpaste, dyes, pigments, mineral water, artificial stone, putty, neutralizing agent, catalyst, fillers, pharmaceuticals.