... . 2 specific gravity is 1.52 3. Soluble in water, insoluble in alcohol Anhydrous Disodium phosphateChemical 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 acidty ...