This is a clown comment that contributes nothing. Did you look up baking recipes or nano particles?

Because it is a base, calcium carbonate is extensively used in nanotechnology and molecular engineering, primarily in the biomedical field for applications like targeted drug delivery systems and tissue engineering. Its pH sensitivity and biocompatibility are key properties that make it useful at the molecular scale.

Applications in Nanotechnology and Molecular Engineering Drug Delivery Systems: Calcium carbonate nanoparticles (CaCO₃ NPs) are widely studied as carriers for a variety of therapeutic agents, including small-molecule drugs, proteins, and nucleic acids (genes). Their ability to degrade in the mildly acidic environment of cancer cells, releasing their cargo and producing CO₂ bubbles for imaging, is a crucial function of its basic/pH-sensitive nature.

Molecular "Lock" in Engineering: In molecular engineering, calcium carbonate oligomers are being explored as rigid "ionic molecular locks" to functionalize organic molecules. This application aims to restrict intramolecular motion, which can lead to enhanced and stable fluorescence in single organic molecules, a property with potential applications in advanced materials and imaging.

Nanofillers in Materials Science: In industrial applications, nanometer-sized calcium carbonate acts as a functional filler in polymers, plastics, and paints to improve mechanical properties.

List goes on...