Calcium hydrogen phosphate is a white crystalline powder or particle, odorless and tasteless, stable in air, and almost insoluble in water. The calcium-phosphorus ratio of calcium hydrogen phosphate is about 1.2:1, and it can also supplement phosphorus as a calcium nutrient fortifier, but it is not suitable for chronic renal insufficiency due to its high phosphorus content. In addition, calcium hydrogen phosphate in the food industry can also be used as water retention agent, leavening agent, acidity regulator, stabilizer, coagulant, anti-coagulating agent, etc., can be widely used in infant formula food, infant auxiliary food, canned food, flour products, beverages, puffed-food, cooked meat products, frozen aquatic products. In the daily chemical industry, calcium hydrogen phosphate is the ideal abrasive for fluoride toothpaste, with low friction hardness and excellent fluorine solubility. In the pharmaceutical industry, calcium hydrogen phosphate can be used as a tablet filler and adsorbent.