kalsiumnitri

Calcium nitrite, with the chemical formula Ca(NO2)2, is the calcium salt of nitrous acid. It is an inorganic, water-soluble salt used mainly for industrial purposes. The compound is typically white to pale crystalline and acts as a relatively strong oxidizing agent.

In chemical terms, calcium nitrite forms aqueous solutions that contain nitrite ions (NO2−). It can decompose upon heating, releasing nitrogen oxides. As an oxidizer, it must be stored away from reducing agents and organic materials, and it should be kept in a dry, well-ventilated area to minimize moisture absorption and caking.

Industrial production of calcium nitrite involves reactions of calcium-containing materials with sources of nitrite under controlled conditions. The exact processes vary by facility, but the goal is to obtain a stable Ca(NO2)2 product that is suitable for downstream use.

The primary commercial use of calcium nitrite is as a corrosion inhibitor for steel reinforcement in concrete. Nitrite ions in solution promote the formation of a protective passive film on steel surfaces, helping to suppress chloride-induced corrosion in reinforced concrete structures. It may also be used as an intermediate in other chemical syntheses.

Safety considerations are important: calcium nitrite is an oxidizer and can intensify fires in the presence of combustible materials. It can be irritating to skin and eyes and may be toxic if ingested. It should be handled with appropriate safety measures, including protective equipment and proper storage away from acids and organic materials.