Zn(No2)2
The compound Zn(NO2)2 is Zinc nitrite, which is an inorganic salt composed of zinc cations (Zn2+) and nitrite anions (NO2-). It has a molecular weight of 189.388 g/mol and a molar mass of 189.39 g/mol.
Zinc nitrite is a white crystalline solid that is sparingly soluble in water. Its melting point is 131°C, and it decomposes at higher temperatures. The compound can be prepared by reacting zinc oxide or zinc carbonate with nitrous acid.
In the solid state, each zinc ion is surrounded by four oxygen atoms from two nitrite ions in a distorted tetrahedral geometry. The nitrite ions are bent with an O-N-O angle of about 115°.
Zinc nitrite is used as a corrosion inhibitor for metals, such as steel and copper alloys. It is also used in the production of organic dyes and pigments. However, its inhalation or ingestion can cause health hazards, such as irritation to the respiratory system and gastrointestinal tract.