In the food industry, it is used as leavening agent, dough conditioner, buffer, tissue improver, curing agent, nutritional supplement, chelating agent, etc. Such as leavening agent for baked products and cakes; leavening agent, buffering agent, pectin solidifying agent (gel action) for bread and biscuits; tissue improver for yeast food meat products, etc. Sodium propionate is used as food preservative and antifungal agent, which can be used alone or in combination with Chemicalbook propionic acid and sorbic acid. Because it is alkaline, it is more suitable for pastry making than calcium propionate. Propionate is of great significance to the preservation of baked goods such as bread, cakes, biscuits, etc. This is because the ionization constant of propionic acid is small, so it still has a good effect under alkaline conditions. For brewing, it can increase the saccharification power and the fermentation capacity of beer; it can be used as a printing agent for viscous substances or a feed additive.