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Beilstein Reference 3903772
Gmelin Reference 1997
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Molar mass 94.9714 g mol−1
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A phosphate is a salt of phosphoric acid. Phosphates are important in biochemistry. Phosphates have the formula PO43- and a molar mass of 94.973 g/mol. An example of a phosphate is sodium phosphate. Three different types of phosphates are known. They are orthophosphate, PO43-; metaphosphate, PO32-; and pyrophosphate, P2O73-.

File:Phosphate Group.PNG
The phosphate functional group


Phosphates are made of one phosphorus atom surrounded by four oxygen atoms. Many phosphates do not dissolve in water.


  1. "Phosphates – PubChem Public Chemical Database". The PubChem Project. USA: National Center of Biotechnology Information.