Calcium bicarbonate is an inorganic acid salt, also known as calcium bicarbonate, with a relative molecular weight of 162.06. Its physicochemical properties are relatively stable below 0 degrees Celsius, but it decomposes more easily at room temperature, resulting in calcium bicarbonate solid. The determination of calcium bicarbonate content in solution can be used as calcium fortifier, emulsion stabilizer, dough conditioner, nutritional supplement, buffer, emulsifier, curing agent, antioxidant synergist, stabilizer and so on. When calcium bicarbonate meets carbon dioxide and water, chemical erosion will occur, generating soluble calcium bicarbonate, the chemical equation is CaCO₃+CO₂+H₂O=Ca(HCO₃)₂, this time the solution is also generally referred to as “hard water”.