Nitrogen tetroxide (N2O4)

Nitrogen tetroxide (N₂O₄) is a chemical compound composed of nitrogen and oxygen atoms. It appears as a colorless, highly reactive, and toxic liquid at room temperature, which readily evaporates into a brownish gas due to its rapid equilibrium with nitrogen dioxide (NO₂). N₂O₄ is primarily used as a propellant in rocket engines and as an oxidizer in certain chemical processes. It plays a crucial role in aerospace technology but must be handled with caution because it is corrosive and poses health hazards if inhaled or contacted.