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Sodium nitrite

Sodium nitrite is the inorganic compound with the chemical formula NaNO2. It is a white to slightly yellowish crystalline powder that is very soluble in water and is hygroscopic. It is a useful precursor to a variety of organic compounds, such as pharmaceuticals, dyes, and pesticides, but it is probably best known as a food additive to prevent botulism.
It is on the World Health Organization’s List of Essential Medicines, the most important medications needed in a basic health system.
Nitrate or nitrite (ingested) under conditions that result in endogenous nitrosation has been classified as “probably carcinogenic to humans” by International Agency for Research on Cancer (IARC).

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