Nitrite (NO 2 −) is often considered in the context of concrete as a corrosion inhibitor, particularly for steel reinforcement within concrete structures exposed to chloride environments, such as those found in coastal areas or where deicing salts are used. By forming a protective layer around the steel, nitrites help prolong the lifespan of reinforced concrete structures. However, the presence of nitrites in concrete can also have implications for the material’s integrity and environmental interactions under severe conditions.