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Cadmium phosphate

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Cadmium phosphate

Cadmium phosphate is an inorganic phosphate salt of cadmium, with the molecular formula Cd3(PO4)2. It is a white, water-insoluble solid.

Tricadmium phosphate can be prepared by the reaction of cadmium chloride with diammonium phosphate at 800 °C:

The precipitation of aqueous cadmium ions with soluble phosphate sources, such as trisodium phosphate and phosphoric acid, does not produce Cd3(PO4)2, but instead produces a hydrate of cadmium with the formula Cd5H2(PO4)4·4H2O. When this compound is heated, it yields a mixture of cadmium phosphate and cadmium pyrophosphate, Cd2P2O7.

Cadmium phosphate can be used as a fertilizer to provide phosphorus to crops for their growth.

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