Disodium hydrogen phosphate: 
 ① formula: Na2HPO4 No. :7558 -79-4 Executive Standard: HG 2920-2000 Physical Properties: colorless monoclinic crystal or white powder. The relative density of 1.52. Soluble in water, weakly alkaline aqueous solution, 1% aqueous solution of pH = 8.8 ~ 9.2; not soluble in alcohol. 35.1 ℃ 5 when the melt and lose water of crystallization. Easily weathered in the air, when placed in air at room temperature lost about five crystal water and the formation of seven water material, heated to 100 ℃, all the crystal water loss from anhydrous, 250 ℃ decomposes into sodium pyrophosphate. The following carefully dried at 34 ℃, can be a white powder, disodium hydrogen phosphate dihydrate. Uses: in food industry as a quality improver, PH regulators, nutrition fortifier, emulsifying agents, mainly for cheese, beverage, jelly, ice cream. 

 ② Character: water and the fruit of two points. Crystalline product contains twelve crystal water. Colorless to white orthorhombic or monoclinic crystal. Use: emulsifier; quality improver; buffer; nutrition fortifier; fermentation agent; pH adjusting agent; binder. Content: 98%