Being an item of commerce TSP is often partially hydrated and could range between anhydrous Na3PO4 into the dodecahydrate Na3PO4·12H2O. Most frequently it is located in white powder kind. It can even be referred to as trisodium orthophosphate or just sodium phosphate. Particular elemental properties span across the periodic table https://jamesm382shv3.empirewiki.com/user