... White powder. 2 :have factory 3 :Soluble in water, insoluble in alcohol 4 :Water treatment agentsChemical formula: Na2HPO4Molecular weight : 141.98Properties: ... White powder,specific gravity is 1.52 . Soluble in water, insoluble in alcohol, the solution is alkalescent., PH value ... fire-preventing agent for fabric ,timber,and paper; as water softener for boilers, as food additive,buffer agent to ...