Sodium Nitrite 0,1 H.

Sodium Nitrite 0,1 H.

Sodium nitrite (sodium nitrite) — NaNO2, is used as improver of coloring and preservative in the food industry in products from meat and fish. Food additive E250. The purified sodium nitrite represents white or slightly yellowish crystal powder. Let's well dissolve in water and it is hygroscopic. On air the donitrata of NaNO3 sodium dookislyatsya slowly. Is strong reducer.

• Sodium nitrite is applied to formation of diazo - amine connections. These connections are applied in synthesis as source of amino groups at reactions with connection "kernel", at the expense of rather easier department of nitric groups N2.

• In vitro sodium nitrite is also used for deactivation of excess of sodium azide [1][2]

2 NaN3 + 2 HNO2 → 3 N2 + 2 NO + 2 NaOH2 NaNO2 + H2SO4 → 2 HNO2 + Na2SO4

• Sodium nitrite in chemical reactions shows oxidation - reduction duality, being recovered to nitrogen oxide (II) or being oxidized to nitrate.

For example, it at further heating decay, forming sodium oxide, nitrogen oxide (II) and oxygen (intermediate compound Na2O2 is, for example). Possibly, this process has helped not to choke to crew of the first operating Cornelius Drebbel's submarine as sodium oxide absorbs CO2[3].

4NaNO2 → 2Na2O + 4NO + O2

• As the food additive is applied in the food industry in two purposes: as antioxidant, and as the antibacterial agent interfering growth of Clostridium botulinum — the causative agent of botulism — the heavy food intoxication caused by botulinum toxin and characterized by defeat of nervous system.
• Entering interaction with myoglobin (protein of meat) gives to meat products characteristic pinkish color. [4]
• In the European Union it can be applied only as additive to salt [the source is not specified 623 days] no more than 0,6% .
• Food additive of E250. Similar properties also potassium nitrite — food additive of E249 possesses.
• Corresponds to state standard specification 4197 - 74 or TU 6 - 09 - 590 - 75 (OSCh 4 - 7 - 3 brand).