NaHNO2

Sodium nitrite (NaHNO₂) is an inorganic salt compound classified as a ceramic material, consisting of sodium cations paired with nitrite anions. While primarily known as a chemical reagent and food preservative, it functions as a ceramic in specific technical applications where its ionic structure and thermal stability are leveraged. This material is notably used in metallurgical processes, corrosion inhibition systems, and specialized industrial chemistry; engineers select it over alternatives when its dual role as both a functional additive and a solid-state component is required, particularly in applications demanding controlled ionic conductivity or thermal resistance in oxidizing environments.