Trisodium phosphate, likewise known as salt phosphate tribasic, is among the most known sodium phosphate salts and also is offered as a food additive and also cleaning agent.

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Formula and structure: The trisodium phopshate chemical formula is Na3PO4. The molar fixed is 163.94 g/mol. The molecule dehydrate is developed by three cations sodium Na+ and one phosphate anion PO43-that room bound through an ionic bond. This salt can additionally be discovered in some hydrated develops as the trisodium phosphate dodecahydrated Na3PO4.H2O. Its chemical structure deserve to be written as below, in the common representations provided for necessary molecules.


Occurrence: Trisodium phosphate is found naturally in some aliments as meat and also vegetables. The phosphate ion in specifically has plenty of biochemical functions and is discovered in animals and plants.

Preparation: Trisodium phosphate is all set from the phosphoric acid. This acid in water produced different types by chemical equilibria. These ion can form the different salt by adding sodium hydroxide and also sodium carbonate to the aqueous solutions:

Na2CO3 + H3PO4 → Na2 HPO4 + CO2 + H2O

Na2HPO4 + NaOH → Na3PO4 + H2O

physical properties: Trisodium phosphate is a white crystalline and hygroscopic solid. The thickness varies follow to the hydratation the the salt, gift 2.53 g/mL because that the anhydrous and 1.62 g/mL because that the dodecahydrate salt. The melting allude is 1583 °C because that the anhydrous and above the melt point, decomposes. It is dissolve in water and insoluble in ethanol.

chemistry properties: Trisodium phosphate similar to other phosphate ions develops a variety of species in aqueous solution due to the different acid-base equilibria:

H3PO4 ⇌ H2PO4- + H+

H2PO4- ⇌ HPO42- + H+

HPO42- ⇌ PO43- + H+

So, to form the trisodium salt, the is required that the phosphoric acid an initial stablished 3 reactions prior to having sufficient phosphate PO4 3- available to kind the Na3PO4.

Uses: Trisodium phosphate is used as ingredient in the production of cleaning and also bleaching agents as degreaser, soaps, detergents, etc, but today its use has decreased due come the environmental issues connected with it. Trisodium phosphate is also used together a food additive in short concentration, although other sodium phosphates have discovered largely applications.

Health effects / safety hazards: Trisodium phosphate deserve to be one eyes and mucous irritator. It has been linked with ecological troubles in rivers and lakes, largely the development of algae because of eutrophication.

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The is not flammable.