Al2PO4

Aluminium phosphate, with the chemical formula Al2PO4, is a chemical compound consisting of aluminium and phosphate ions. It is a white, crystalline powder that is insoluble in water but soluble in acids. Aluminium phosphate is commonly used as a flame retardant in plastics and textiles, as well as a catalyst in various chemical reactions. It is also used in the production of ceramics and as a component in some pharmaceuticals.

The compound can exist in several forms, including the monohydrate (Al2PO4·H2O) and the dihydrate (Al2PO4·2H2O). The monohydrate is more commonly used in industrial applications due to its higher stability and lower water content.

Aluminium phosphate is typically synthesized through the reaction of aluminium hydroxide with phosphoric acid. The resulting compound can be further processed to produce various forms and sizes suitable for different applications.

In environmental contexts, aluminium phosphate is often considered a contaminant due to its potential to leach into water bodies and affect aquatic life. However, its use in flame retardants and other applications is essential for safety and performance in various industries.