Nitritt

Nitrite refers to the anion with the chemical formula NO2-. It is a diatomic polyatomic ion with a nitrogen atom and two oxygen atoms, carrying a net charge of -1. Nitrite is the conjugate base of nitrous acid, HNO2. It is commonly found as salts, such as sodium nitrite (NaNO2) and potassium nitrite (KNO2).

In nature, nitrites are formed during the process of nitrification, a part of the nitrogen cycle. Bacteria in the soil and water convert ammonia into nitrites, which can then be further converted to nitrates. Nitrites are also present in some foods, particularly cured meats, where they are added as preservatives and to enhance color and flavor. The use of nitrites in food has been a subject of debate due to potential health concerns.

When consumed, nitrites can be converted to nitrosamines in the body, some of which are known carcinogens. However, the risk is generally considered low, and the benefits of using nitrites as preservatives, such as preventing the growth of harmful bacteria like Clostridium botulinum, are also acknowledged. Regulatory bodies set limits on the amount of nitrites allowed in food products.

Nitrites have various industrial and medical applications. Sodium nitrite is used in metallurgy, in the production of dyes, and as an antidote for cyanide poisoning. In medicine, it has been investigated for its vasodilating properties. Due to its reactivity, handling and storage of nitrites require care.