Used medicinally as a calcium supplement or as an antacid; raw/primary substance for building materials; used in the purification of iron from iron ore in a blast furnace;In the oil industry, it is added to drilling fluids
as a formation-bridging and filtercake-sealing agent; it is added to swimming pools, as a pH corrector for maintaining alkalinity and offsetting the acidic properties of the disinfectant agent.it is a main source for growing Seacrete, or Biorock.Precipitated calcium carbonate (PCC), Fine ground calcium carbonate (GCC) is an essential ingredient in the microporous film used in babies’ diapers. Printing and writing paper can contain 10–20% calcium carbonate. Used as an extender in paints; filler in plastics. Used in the pharmaceutical industry as an inert filler for tablets and other pharmaceuticals.Used in the production of toothpaste.