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. UDMH is mildly alkaline and is a very strong reducing agent. Its high chemical reactivity, easily-controlled functionality and strong hydrogen bonding are its most useful properties. It is a highly polar solvent, miscible with other polar solvents but immiscible with non-polar solvents.
Anhydrous hydrazine is available in monopropellant and standard grades.
Specifications for standard grade anhydrous hydrazine are given in Table 7 below. 98 Iron, max 0.003 Water, max 1.5 Aniline, max 0.5 Physical properties of anhydrous hydrazine are given in Table 8. Many of these properties are similar to those of water. In addition, anhydrous hydrazine is a strong reducing agent. Mixtures of hydrazine and very strong oxidizers are hypergolic.