Dipotassium phosphate

Dipotassium Phosphate

Dipotassium phosphate

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Dipotassium phosphate (K<sub>2</sub>HPO<sub>4</SUB>) - also phosphoric acid, dipotassium salt; dipotassium hydrogen orthophosphate; potassium phosphate, dibasic - is a highly water-soluble salt which is often used as a fertilizer, food additive and buffering agent. It is a common source of phosphorus and potassium.

The pH of a dipotassium phosphate solution is almost neutral. It is formed by the stoichiometric neutralization of phosphoric acid with potassium hydroxide:

H<sub>3</sub>PO<sub>4</sub> + 2 KOH → K<sub>2</sub>HPO<sub>4</sub> + 2 H<sub>2</sub>O

It reacts with phosphoric acid to generate monopotassium phosphate:

K<sub>2</sub>HPO<sub>4</sub> + H<sub>3</sub>PO<sub>4</sub> → 2 KH<sub>2</sub>PO<sub>4</sub>


As a food additive, Dipotassium phosphate is on the FDA's Generally recognized as safe, or GRAS, list of substances (listed as potassium phosphate, dibasic)


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