Dinitrogen tetroxide (nitrogen peroxide) http://en.wikipedia.org/wiki/Dinitrogen_tetroxide (http://en.wikipedia.org/wiki/Dinitrogen_tetroxide)
Hydrazine http://en.wikipedia.org/wiki/Hydrazine (http://en.wikipedia.org/wiki/Hydrazine)
Both can be made from air, water, and electricity (I believe). I think it's pretty cool that rocket fuel can be made from air. They look like very dense fuel and oxidizer.
Could this be the fuel of tomorrow? It has definitely been the fuel of yesterday.
Thank you space race!
both of these chemicals can be purchased for less than the cost of the commercial electricity required to make them yourself. i just would not reccomend buying large quantities of either, or you may get a little 'visit' from some friends that want to know what your up to...