Nanometer calcium carbonate is widely used in the plastics industry as a filler to enhance mechanical properties, improve dimensional stability, and reduce production costs. In the rubber industry, it acts as a reinforcing agent, improving tensile strength, wear resistance, and elasticity of rubber products.

In the paper industry, it serves as a coating and filler, improving paper brightness, opacity, and smoothness while reducing costs. It is also utilized in paints and coatings to enhance durability, weather resistance, and gloss.

In the pharmaceutical and food industries, nanometer calcium carbonate is used as a dietary calcium supplement and an antacid. Additionally, it finds applications in adhesives, sealants, and construction materials to improve performance and durability. Its small particle size and high surface area make it a versatile additive in various industrial applications.