Disodium Phosphate (DSP).It is commercially available in both the hydrated and anhydrous forms.

Disodium Phosphate

Molecular formula: Na2HPO4. XH2O (X=0,12)Molecular weight: 358.0Standard executed: HG/T2965-2000 (Industrial Grade); HG2920-2000 (Food Grade)Properties: White or colorless crystalline free flowing solid, efflorescent in air, easily soluble in water, but insoluble in alcohol, its water solution is slightly alkaline, relative density at 1.63, melting point at 34.6°CUses:Used as a fire-prevention agent for fabric, timber, and paper, also as water softening agent for boiler, food additive, buffering agent, solder, tanning agent, etc.Packing and storage: In 25kg, 50kg, 1000kg net bags,  store at a cool, dry and well ventilated place.

Disodium Phosphate (DSP)