Mixtures of hydrazine and a very strong oxidizers are hypergolic. They also have other properties, such as high specific impulse, which makes them valuable as aerospace fuels. It has an odor typical of relatively short-chain organic amines. Monomethyl hydrazine is miscible with water, hydrazine, hydrazine derivatives, amines and lower weight monohydric alcohols. It is soluble in hydrocarbons.
Monomethyl hydrazine is a mildly alkaline base and a very strong reducing agent.
Its highly chemical reactivity, easily controlled functionality and strong hydrogen bonding are its most useful properties. Specifications for monomethyl hydrazine are given in Table 3 below. Physical Properties of monomethyl hydrazine are shown in Table 4 below. It has an ammonia-like odor which closely resembles that of aliphatic amines. UDMH is miscible with water, hydrazine, dimethylhydrazine, ethanol, amines and most petroleum fuels.