Used as boiler water softener, weight gainer for tanning and fabrics, flame retardant for wood and paper, glaze and welding flux. Mordant for dyeing, used as stabilizer for hydrogen peroxide bleaching in the printing and dyeing industry. It is the raw material for the manufacture of sodium pyrophosphate and other phosphates. It is also a culture agent for monosodium glutamate, erythromycin, penicillin, streptomycin and sewage biochemical treatment products. It not only has the purpose of disodium hydrogen phosphate dodecahydrate, but also prevents agglomeration during transportation and storage.