Sodium phosphate

Phosphate also forms families or condensed anions including di-, tri-, tetra-, and polyphosphates.

Sodium phosphates are popular in commerce in part because they are inexpensive and because they are nontoxic at normal levels of consumption.

Oral phosphate prep drugs have been withdrawn in the United States, although evidence of causality is equivocal.

In addition to these phosphates, sodium forms a number of useful salts with pyrophosphates (also called diphosphates), triphosphates and high polymers.

Polymeric sodium phosphates are formed upon heating mixtures of NaH2PO4 and Na2HPO4, which induces a condensation reaction.