Potassium phosphate, also known together potassium phosphate monobasic or potassium bisphosphate is a salt used as fertilizer and also food additive.

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Formula and also structure: Although there are number of potassium phosphate salts that vary according to the setup and number of ions of every one, in this short article will be think about the potassium phosphate monobasic. The potassium phosphate monobasic chemical formula is KH2PO4. The molar mass is 136.086 g/mol. This molecule is created by one cation K+ and also one biphosphate anion H2PO4-. The structure varies with the temperature; at room temperature the framework is orthorhombic, while at high temperature it is monoclinic. Its chemistry structure can be written as below, in the usual representations offered for necessary molecules.


Occurrence: Potassium phosphate deserve to be found in the life organisms together being part of some biochemical pathways and it can also be uncovered in ores and minerals.

Preparation: Potassium phosphate is created through the reaction that phosphoric acid and also potassium carbonate, v the reaction:

H3PO4 + K3CO2 → KH2PO4 + CO2

It can additionally be produced by making use of potassium hydroxide or chloride rather of potassium carbonate.

Physical properties: Potassium phosphate is a white, odorless and also deliquescent powder. The density of this salt is 2.33 g/L. That melting suggest is 252.6 °C and the boiling point is 400 °C. Potassium phosphate is highly soluble in hot water, although it is also soluble in cold water however the rate is smaller. The is likewise slightly dissolve in ethanol.

Chemical properties: Potassium phosphate exhibits interesting electrical properties. The compound is ferroelectric below -150 °C, meaning that the molecule has actually a spontaneous electrical polarization that have the right to be used in order to get conductors and piezoelectric materials.

Uses: Potassium phosphate is offered in the laboratories, pharmaceutical and also food sectors as buffering agents. The buffers all set with potassium phosphate have the advantage of reaching the physiological pH 7.4. That is also used as emulsifying salt for production of cheese and meat. Potassium phosphate is likewise used as a fertilizer and also due to its chemical properties have the right to be used in the production of piezoelectric materials.

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Health impacts / security hazards: Potassium phosphate is dangerous for ingestion in big quantities. The is not combustible, although as soon as heated, can emit toxic fumes.