Aluminium phosphate

Aluminium phosphate is a chemical compound. In its anhydrous form, it appears as a white or colorless crystalline powder. It is often used in a variety of applications, including ceramics, pharmaceuticals, and food processing.

Chemical Structure

Aluminium phosphate is composed of one aluminium ion (Al3+) and three phosphate ions (PO4 3-). The aluminium ion is coordinated to six oxygen atoms, forming an octahedral arrangement. The phosphate ions are tetrahedrally coordinated to four oxygen atoms.

Properties

Aluminium phosphate is insoluble in water, but it can be dissolved in acids to form a variety of acid-phosphate salts. It has a high melting point and is stable at room temperature. It is non-toxic and has a low reactivity, making it suitable for use in a variety of applications.

Applications

Ceramics

In the ceramics industry, aluminium phosphate is used as a binder and flux. It helps to improve the mechanical strength of ceramic products and reduces their porosity.

Pharmaceuticals

In the pharmaceutical industry, aluminium phosphate is used as an adjuvant in vaccines. It enhances the immune response to the vaccine by slowing the release of the antigen and stimulating the immune system.

Food Processing

In food processing, aluminium phosphate is used as a leavening agent. It releases carbon dioxide when heated, causing dough to rise.

Health Effects

Aluminium phosphate is generally considered safe for use in food and pharmaceuticals. However, excessive consumption can lead to aluminium toxicity, which can cause neurological disorders and bone diseases.

See Also

• Aluminium
• Phosphate
• Ceramics
• Pharmaceuticals
• Food processing