Disodium Phosphate White powder,or solid crystal,Used as a fire-prevention agent for fabric, timber, and paper, also as water Disodium Phosphate Chemical Name: Disodium Phosphate AnhydrousFormula: Na2HPO4Molecular weight:358.057Properties :White or colorless crystalline free flowing solid, easily soluble in water, but insoluble in ethanol, its water solution is slightly alkaline, relative density ...