What is the Difference Between Dicalcium Phosphate and Monocalcium Phosphate?

Dicalcium phosphate and monocalcium phosphate are both inorganic compounds composed of calcium cations and phosphate anions, but they have different anion compositions and applications in various industries.

• Dicalcium Phosphate: This compound has a single HPO42- anion per molecule and is also known as calcium phosphate with the chemical formula CaHPO4. It is often used as a dietary supplement due to its high calcium and phosphorus content, and it can be found in the form of a white powder with no odor or a slightly yellowish appearance.
• Monocalcium Phosphate: This compound has two H2PO4- anions per molecule and is a powder of medium hygroscopicity with medium particle size (0.2-1.4 mm). It is often used in the feed industry as a source of phosphorus and calcium for livestock and poultry, and it has the highest phosphorus content by weight compared to other inorganic phosphate sources. Monocalcium phosphate derived from dicalcium phosphate via the HCl production process has a particularly high digestibility due to its purity.

In summary, the main difference between dicalcium phosphate and monocalcium phosphate lies in their anion compositions and applications. Dicalcium phosphate is often used as a dietary supplement, while monocalcium phosphate is primarily used in the feed industry for livestock and poultry.

Comparative Table: Dicalcium Phosphate vs Monocalcium Phosphate

Dicalcium phosphate and monocalcium phosphate are both inorganic compounds composed of anions, but they have different chemical formulas and properties. Here is a table comparing their differences:

Dicalcium phosphate has a HPO4^2- anion per molecule, while monocalcium phosphate contains two H2PO4^1- anions per molecule. Monocalcium phosphate is the only water-soluble calcium phosphate, which is related to its increased digestibility. Both compounds are used as dietary supplements, but monocalcium phosphate is more commonly used in feed production due to its higher phosphorus content and digestibility.