Di sodium phosphate (DSP), or di sodium hydrogen phosphate, or sodium phosphate dibasic, is the inorganic compound with the formula Na2HPO4. It is one of several sodium phosphates. The salt is known in anhydrous form as well as forms with 2, 7, 8, and 12 hydrates. All are water-soluble white powders; the anhydrous salt being hygroscopic.[1]

Description / Parameter Specification / Limits
CAS # 64-19-7
Molecular Formula Na2HPO4
Molecular Weight 142.0
Appearance Colorless Crystalline Solid