NaN₃, or sodium azide, is a chemical compound with the formula NaN₃. It appears as a white crystalline solid and is primarily used as a preservative in laboratories and as a propellant in automotive airbags. Sodium azide is known for its ability to release nitrogen gas rapidly when it decomposes, making it useful in various applications. However, NaN₃ is also highly toxic and can be dangerous if not handled properly. It can cause serious health issues if ingested or inhaled, and it poses environmental risks. Safety precautions are essential when working with sodium azide to prevent accidents and exposure.