... 3.98% purity Specifications:DSP 98% Anhydrous:1 :White powder. 2 :have factory 3 :Soluble in water, insoluble in ... Water treatment agentsChemical formula: Na2HPO4Molecular weight : 141.98Properties: White powder,specific gravity is 1.52 . Soluble in water, insoluble in ... food additive,buffer agent to acidty,as glaze,solder,baking powder,tanning agent,and for manufacture of pyphosphate,etc.Technical ...