Nitrogen Tetroxide is a chemical compound with the formula N2O4. It is a colorless gas at room temperature but can easily turn into a yellowish liquid when cooled. This compound is known for its strong oxidizing properties, making it useful in various applications, including rocket propellants. When N2O4 is heated, it can break down into another compound called Nitrogen Dioxide (NO2), which is a reddish-brown gas. Due to its reactive nature, Nitrogen Tetroxide must be handled with care, as it can be harmful if inhaled or if it comes into contact with skin.