Ca3PO422H2O

Tricalcium phosphate dihydrate is a chemical compound with the formula Ca3(PO4)2·2H2O. It is a hydrated form of tricalcium phosphate. This compound is a white, crystalline solid. It is sparingly soluble in water but dissolves more readily in dilute acids. Its structure consists of calcium ions and phosphate ions, with two water molecules associated with each formula unit. The presence of these water molecules distinguishes it from anhydrous tricalcium phosphate. Tricalcium phosphate dihydrate is found naturally in some geological formations and can also be synthesized. It plays a role in biological systems, particularly in bone and teeth, though other forms of calcium phosphate are more prominent. In industrial applications, it can be used as a food additive, an anticaking agent, or a source of calcium and phosphorus. Its specific properties, such as particle size and purity, are important for its various uses. The stability of the dihydrate form is dependent on environmental conditions such as temperature and humidity. Dehydration can occur, leading to the formation of anhydrous tricalcium phosphate.