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Sodium nitrate is a salt that is often added to jerky, bacon and luncheon meats. Sodium nitrite, on the other hand, is a salt and antioxidant that is commonly used to cure ham and bacon. Both chemicals act as food preservatives and add a red or pink color to processed meats, among other uses.
A mixture of sodium nitrate, calcium nitrate and potassium nitrate is used as energy storage material in prototype plants, such as Andasol Solar Power Station and the Archimedes project. It is also used in the wastewater industry for facultative microorganism respiration.odium nitrate should not be confused with sodium nitrite, which is also a common food additive and preservative used for example, in deli meats. Less common applications include as an oxidizer in fireworks replacing potassium nitrate commonly found in black powder and as a component in instant cold packs.