Trisodium phosphate, additionally known as sodium phosphate tribasic, is among the most recognized sodium phosphate salts and is provided as a food additive and cleaning agent.

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Formula and also structure: The trisodium phopshate chemistry formula is Na3PO4. The molar fixed is 163.94 g/mol. The molecule dehydrate is developed by 3 cations salt Na+ and one phosphate anion PO43-that space bound through an ionic bond. This salt can likewise be uncovered in part hydrated forms as the trisodium phosphate dodecahydrated Na3PO4.H2O. Its chemistry structure deserve to be written as below, in the common representations offered for necessary molecules.


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

Preparation: Trisodium phosphate is all set from the phosphoric acid. This mountain in water created different varieties by chemistry equilibria. These ion can kind the various salt by including sodium hydroxide and also 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 hygroscopic solid. The density varies follow to the hydratation of the salt, being 2.53 g/mL because that the anhydrous and 1.62 g/mL for the dodecahydrate salt. The melting point is 1583 °C for the anhydrous and over the melting point, decomposes. It is soluble in water and insoluble in ethanol.

chemistry properties: Trisodium phosphate similar to other phosphate ions creates a selection of species in aqueous solution because of the various acid-base equilibria:

H3PO4 ⇌ H2PO4- + H+

H2PO4- ⇌ HPO42- + H+

HPO42- ⇌ PO43- + H+

So, to type the trisodium salt, the is necessary that the phosphoric acid an initial stablished 3 reactions before having enough phosphate PO4 3- available to form the Na3PO4.

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

Health results / safety hazards: Trisodium phosphate have the right to be an eyes and also mucous irritator. It has been linked with ecological troubles in rivers and also lakes, largely the formation of algae as result of eutrophication.

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That is no flammable.