Calcium metaphosphate is an inorganic compound. It is a salt compound composed of calcium ions (Ca2+) and phosphate ions (PO43-). The common crystal structure of calcium metaphosphate is apatite crystals, which appear in the form of a white solid.

Calcium metaphosphate is an important raw material for phosphate fertilizers and is widely used as a phosphorus source for plants in agriculture. Phosphorus is one of the main nutrients required by plants, and calcium metaphosphate can provide the phosphorus needed by plants, promoting their growth and development.

In addition to being used as a raw material for phosphate fertilizers, calcium metaphosphate is also applied in other fields. In medicine, calcium metaphosphate is used as a promoter of bone growth and bone density. It can be absorbed by the human body and used for the development and repair of bone tissue. Calcium metaphosphate can also be used to prepare materials such as ceramics, glass, and cement.

When using calcium metaphosphate, it is necessary to strictly follow the safety operating procedures to avoid the production of harmful substances or pollution to the environment.