11Dimethylhydrazine

1,1-Dimethylhydrazine, also known as unsymmetrical dimethylhydrazine (UDMH), is an organic compound with the chemical formula (CH3)2NNH2. It is a colorless liquid with a pungent, fishy odor. UDMH is highly flammable and a potent reducing agent. It is miscible with water, ethanol, and ether.

UDMH is primarily used as a rocket propellant, often in combination with oxidizers such as nitrogen tetroxide. This hypergolic combination ignites spontaneously on contact, making it useful for rocket engines that require immediate ignition. It has been employed in various spacecraft and missile systems.

Beyond its propellant applications, UDMH has been used in the synthesis of other chemicals, including pharmaceuticals and pesticides. However, its use in these areas is limited due to its toxicity and hazardous properties.

1,1-Dimethylhydrazine is a highly toxic substance that can cause severe irritation to the skin, eyes, and respiratory tract. Exposure can lead to central nervous system effects, liver and kidney damage, and is a suspected carcinogen. Due to its hazardous nature, strict safety precautions are necessary when handling UDMH. Its environmental impact is also a concern, as it can be persistent in the environment and harmful to aquatic life.