White powder, easily soluble in water, its aqueous solution is alkaline; Insoluble in alcohol. Easy to dissolve due to moisture. Exposed to humid air to absorb moisture and generate dihydrate to heptahydrate. Disodium hydrogen phosphate is used as a quality improver in food processing, such as emulsifying in cheese and beverage processing, and as a stabilizer; Used in the processing of salted meat, sausages, and cooked meat products, it can make the color bright, improve taste, shorten processing time, and improve the quality of the product. It has the effect of increasing the chelating metal ions, pH value, and ion strength of the food, thereby improving the adhesion and water holding capacity of the food.