Hydrazine hydrate is a colorless flammable liquid generally made by the reaction of sodium hypochlorite and ammonia or urea It is utilized widely as a reducing agent corrosion inhibitor and blowing agent It is a colorless liquid with a strong ammonia like odor It is a solution of hydrazine N2H4 in water typically containing 35 64 hydrazine by weight Hydrazine hydrate is a highly toxic and corrosive substance and it must be handled with care