Hypergolic inflammation
Energetic Ionic Liquids (EILs)

In almost all cases, once mixed, liquids or gases do not react violently at ambient temperature unless there is an external input of energy (mechanical spark, electrical spark, hot surface, hot gas jet, etc.). However, certain combinations are known to react rapidly and can, under certain conditions, lead to violent explosions. These substances are known in the field of chemical hazards as incompatible substances. This incompatibility can become an advantage, as explained below. Monomethylhydrazine and nitrogen tetroxide (MMH and NTO) is one such combination, and is the chosen choice to create a thrust for many applications. The use of this type of system in civil and military space and chemical propulsion will be discussed later. These low-temperature ignitions (at 298 K or less) are known as hypergolic ignitions. The absence of a point source of ignition (spark, flame, etc.) means that...