Hydrazine (assuming you could even get it) is not something to play with at home. I'm a contractor at a USAF test facility where I have worked extensively in a rocket test cell testing Titan IV LR-91 rocket engines. Full hazmat suits are used around the Aerozine 50 (a variant of hydrazine) propellant systems, because when absorbed into the skin it has some very nasty effects on the body. Hydrazine is a hypergolic propellant, that is it spontaneously combusts with certain oxidizers. It is most often used in rockets with nitrogen tetroxide (N204). As a side note, when N204 leaks from pipes, it makes fuming red nitric acid clouds
that turn to nitric acid in your lungs.

Go here for additional hydrazine info:


http://wwwsam.brooks.af.mil/web/ram/.../hydrazine.htm