Chromium nitrite

Chromium nitrite as a distinct compound is not common; instead, the terms more commonly encountered are chromium nitride (CrN) or chromium nitrate (Cr(NO3)3).

Chromium nitride (CrN) is an interstitial compound where nitrogen atoms occupy octahedral sites in the chromium metal lattice, forming a hexagonal crystal structure. It is an extremely hard, corrosion-resistant material used primarily as a coating for durability and wear resistance in industrial applications. Chromium nitride does not contain nitrite ions and is not a typical chromium(III) compound.​

If you mean chromium nitrate, it is an inorganic compound usually appearing as blue-violet crystals with the formula Cr(NO3)3 or hydrated forms such as Cr(NO3)3·6H2O. It serves as a catalyst and precursor for various chromium compounds in dyeing, coatings, and chemical synthesis. Chromium nitrate forms octahedral complexes coordinated by water and nitrate ligands.​

Please specify if you meant nitride or nitrate for more precise information.