Also called
dibasic sodium phosphate, disodium phosphate. a water-soluble compound that in its anhydrous form, Na
2 HPO
4 , occurring as a white, crystalline, hygroscopic powder, is used chiefly in the manufacture of ceramic glazes, enamels, baking powder, and cheeses, and that in its hydrated form, Na
2 HPO
4 ⋅xH
2 O, occurring as clear colorless crystals, is used chiefly in the manufacture of dyes, fertilizers, detergents, and pharmaceuticals.