NASA has a vintage 1966 video "Toxic Propellant Hazards in Rocketry" that provides an interesting discussion of the dangers of nitrogen tetroxide and hydrazine

NASA has a vintage 1966 video "Toxic Propellant Hazards in Rocketry" that provides an interesting discussion of the dangers of nitrogen tetroxide and hydrazine propellants. It includes people mixing them together in the desert, along with a dramatization of how to deal with a nitrogen tetroxide leak. https://www.youtube.com/watch?v=ND2TeNfcmKA https://www.youtube.com/watch?v=ND2TeNfcmKA