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

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Formula and also structure: The trisodium phopshate chemistry formula is Na3PO4. The molar massive is 163.94 g/mol. The molecule dehydrate is created by 3 cations salt Na+ and also one phosphate anion PO43-that space bound through an ionic bond. This salt can likewise be uncovered in some hydrated creates as the trisodium phosphate dodecahydrated Na3PO4.H2O. Its chemistry structure have the right to be composed as below, in the typical representations supplied for organic molecules.


Occurrence: Trisodium phosphate is discovered naturally in some aliments together meat and also vegetables. The phosphate ion in particularly has numerous biochemical functions and is discovered in animals and plants.

Preparation: Trisodium phosphate is ready from the phosphoric acid. This acid in water developed different species by chemistry equilibria. These ions can kind the different salt by adding sodium hydroxide and sodium lead carbonate to the aqueous solutions:

Na2CO3 + H3PO4 → Na2 HPO4 + CO2 + H2O

Na2HPO4 + NaOH → Na3PO4 + H2O

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

chemistry properties: Trisodium phosphate similar to various other phosphate ions creates a range of types in aqueous solution due to the different acid-base equilibria:

H3PO4 ⇌ H2PO4- + H+

H2PO4- ⇌ HPO42- + H+

HPO42- ⇌ PO43- + H+

So, to type the trisodium salt, it is necessary that the phosphoric acid first stablished 3 reactions before having enough phosphate PO4 3- accessible to type the Na3PO4.

Uses: Trisodium phosphate is offered as component in the manufacturing of cleaning and also bleaching agents as degreaser, soaps, detergents, etc, but today its usage has decreased due come the eco-friendly issues associated with it. Trisodium phosphate is likewise used together a food additive in low concentration, although various other sodium phosphates have uncovered largely applications.

Health results / safety and security hazards: Trisodium phosphate have the right to be one eyes and also mucous irritator. It has been linked with ecological troubles in rivers and lakes, mostly the development of algae because of eutrophication.

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That is no flammable.