Sodium Nitrate, one of the earliest nitrogen fertilizers, is suitable for acidic soils and particularly ideal for root crops like sugar beets and radishes. It serves as an important raw material for manufacturing nitrates, picric acid, explosives, mineral raw materials and dyes, and is used as a pharmaceutical osmotic pressure regulator, widely covering glass, metallurgy and light industries. In glass production, it acts as a defoamer, decolorizer, clarifier and oxidation solubilizer; in enamel industry as an oxidant and solubilizer for enamel powder; in machinery industry as metal cleaner and metal bluing agent; in metallurgy for steel and aluminum alloy heat treatment; in light industry as cigarette combustion improver; and in pharmaceutical industry as penicillin culture medium. In meat products, it can be biologically reduced to sodium nitrite to realize color protection and bacteriostasis, and is approved as a food color fixative in China. It is also applied as a decolorizer for molten caustic soda and a common analytical reagent.