- a colorless, oily, fuming liquid, N2H4, that is a weak base in solution and forms a large number of salts resembling ammonium salts: used chiefly as a reducing agent and a jet-propulsion fuel.
- a class of substances derived by replacing one or more hydrogen atoms in hydrazine by an organic group.
- a colourless basic liquid made from sodium hypochlorite and ammonia: a strong reducing agent, used chiefly as a rocket fuel. Formula: N 2 H 4
