Calcium Carbonate, white solid, powder, tasteless, odorless, neutral, basically insoluble in water, soluble in hydrochlori acid. With a calcium content of 40%, it is a widely used calcium source on the market. From the production process, there are mainly three categories of heavy calcium carbonate, light calcium carbonate and biological calcium carbonate, in food, dairy products, health products and other industries, calcium carbonate can be used as an additive, as a calcium supplement its absorption rate can reach 39%, second only to calcium fruit acid, due to its soluble in stomach acid, has become more dosage forms, more applications of calcium supplements, in the pharmaceutical industry, Calcium carbonate can not only promote fracture healing, but also play a role in neutralizing stomach acid; In the toothpaste daily chemical industry, it is mainly used as a filler to increase product volume and reduce production costs.