Tags: Chemical Compound, Chemical Substance.
Sodium trimetaphosphate (also STMP) with formula Na3P3O9 is a metaphosphate of sodium. It has the empirical formula NaPO3. It is the sodium salt of trimetaphosphoric acid. It is a colourless solid that finds specialised applications in food and construction industries. STMP is prepared by heating sodium polyphosphate at a few hundred degrees.Although drawn with a particular resonance structure the trianion has D3d symmetry.
