Monomethylhydrazine (MMH) is a colorless, flammable liquid with a strong ammonia-like odor. It is primarily used as a rocket propellant and is known for its high energy content. MMH is classified as a hydrazine derivative, which means it contains nitrogen and hydrogen atoms. Due to its reactivity, it must be handled with care, as it can be toxic and harmful to human health. In addition to its use in aerospace applications, MMH is also utilized in various chemical synthesis processes. It can act as a reducing agent and is involved in the production of other chemicals. Safety measures are essential when working with MMH, as exposure can lead to serious health risks, including respiratory issues and skin irritation.