Trisodium phosphate appears as a white granular solid with a chemical formula of Na3PO4. It is highly soluble in water and is widely in several applications such as cleaning agent, lubricant, and food additive.
Trisodium phosphate is produced through a neutralisation reaction between sodium hydroxide and disodium phosphate, which is produced using sodium carbonate and phosphoric acid.
Na2CO3 + H3PO4 → Na2HPO4 + CO2+ H2O
Na2HPO4 + NaOH → Na3PO4 + H2O
It is used widely in detergents to saponify grease and oils. When combined with surfactants, it is an excellent cleaning agent for a wide range of applications, from laundry to cleaning of concrete surfaces.
It is used in the degreasing and deglossing of walls which gives a better surface for greater adhesion of the paint.
It is commonly used as acidity regulators and it has the collective E number E339.