trisodium phosphate

noun3

1. •
   Na₃PO₄ : An inorganic compound composed of three sodium atoms attached to a phosphate group, of a phosphorus atom and four oxygen atoms. An alkaline basic caustic granular white crystalline substance.
2. •
   A phosphate cleaning agent and degreaser, used for cleaning surfaces and laundry.
3. •
   A phosphate food additive used as an acidity modifier.