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Sodium-nitrite (NaNO2) is a white or slightly yellowish crystalline powder that is widely used as a food preservative and coloring agent. Here are some common uses of sodium-nitrite:
Food Preservation: Sodium-nitrite is used as a preserving agent in meat products, such as ham, bacon, and hot dogs, to prevent bacterial growth and to maintain the pink color of cured meats.
Industrial Applications: Sodium-nitrite is used in various industrial applications, including in the manufacturing of dyes, pigments, and explosives.
Medical Applications: In medicine, sodium-nitrite is used in the treatment of cyanide poisoning, where it binds with hemoglobin to form methemoglobin, which then binds with the cyanide and inhibits its toxic effects.
Corrosion Inhibition: Sodium-nitrite is added to industrial cooling systems as an inhibitor to prevent corrosion.
Laboratory Applications: Sodium-nitrite is used as a reagent in various chemical reactions and is often used in combination with other chemicals as an analytical tool for determining the presence of certain substances.
Wastewater Treatment: It is used in wastewater treatment plants to remove heavy metals from wastewater and to promote the growth of beneficial bacteria.
Sodium-nitrite has various industrial and commercial uses, but it should be handled with care because it can be toxic at high concentrations. When it is used as a food preservative, regulations require that sodium-nitrite levels be monitored to ensure that they are within safe limits.
