Sodium Nitrite
Sodium nitrite is an 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. From an industrial perspective, it is the most important nitrite salt. It is a precursor to a variety of organic compounds, such as pharmaceuticals, dyes, and pesticides, but it is probably best known as a food additive used in processed meats and (in some countries) in fish products.
Application
It is used as a colour fixative and preservative in meats and fish. It is also used in: adhesives, binding agents, anti-freezing agents, cleaning/washing agents, disinfectants, colouring agents, construction materials additives, corrosive inhibitors, cutting fluids, fillers, food/foodstuff additives, heat transferring agents, intermediates, laboratory chemicals, lubricants and additives, non agricultural pesticides, oxidizing agents, pesticides, pharmaceuticals, process regulators, reducing agents, stabilizers, surface-active agents.
| Molar mass | 68.9953 g/mol |
|---|---|
| Chemical formula | NaNO2 |
| Appearance | white or slightly yellowish solid |
| Density | 2.168 g/cm3 |
| Melting point | 271 °C (520 °F; 544 K) (decomposes at 320 °C) |
| Solubility in water | 71.4 g/100 mL (0 °C) |
| Solubility | soluble in methanol (4.4 g/100 mL) |
| Acidity (pKa) | ~9 |
| Magnetic susceptibility (χ) | −14.5·10−6 cm3/mol |
| Refractive index (nD) | 1.65 |
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