Nitritu di sodiu

Sodium nitrite (NaNO₂) is an inorganic salt produced by the combination of nitrite ions and sodium ions. Sodium nitrite is easily delixable, easily soluble in water and liquid ammonia, its aqueous solution is alkaline, its pH is about 9, slightly soluble in ethanol, metanolu, etere è altri solventi organici. Sodium nitrite has a salty taste and is used to make fake salt. Sodium nitrite reacts with oxygen to form sodium nitrate when exposed to air. If heated above 320 ° C, it decomposes to produce oxygen, nitrogen oxide and sodium oxide. Contact with organic matter is easy to burn and explode. Because of its salty taste and cheap price, it is often used as an unreasonable substitute for salt in illegal food production, because sodium nitrite is toxic, and food containing industrial salt is very harmful to the human body and carcinogenic.

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Applicazione

1. Campu industriale: In the dye industry, sodium nitrite is mainly used in the production of diazo compound dyes, azo dyes and so on. In metal surface treatment, sodium nitrite can be used as rust prevention agent, heat treatment agent and so on. In più, sodium nitrite can also be used in the production of rubber, photographic developer, plating solution and so on.

2. Campu di l'alimentariu: Sodium nitrite is mainly used as a color guard and preservative in the food industry, which can be used to maintain the color of meat, fish and other foods, and inhibit the growth of bacteria to extend the shelf life of food. In più, sodium nitrite can also be used in food flavor regulators, antioxidants and so on. Tuttavia, the use of sodium nitrite in food requires strict control of the amount and conditions of use to ensure the safety of food.

3. Medical field: Sodium nitrite also has certain applications in the medical field, and can be used to treat cyanide poisoning. In più, sodium nitrite can also be used to prepare some pharmaceutical raw materials or intermediates.