... in water, insoluble in alcohol 4 Water treatment agents Anhydrous Disodium phosphateChemical formula Na2HPO4Molecular weight 141.98Properties White powder,specific gravity ... ,and paper; as water softener for boilers, as food additive,buffer agent to acidty,as glaze,solder,baking powder,tanning agent ... ,as pb %≤0.0019Arsenic,as As %≤0.0003 dsp 98% Disodium Phosphate