Syntheses and analyses of N,N '-dinitrourea

N,N ' -Dinitrourea was prepared through nitration of urea at low temperatur e in mixed acids in 67% yield. The prepared material was pure and found to be stable at room temperature. The properties of N,N ' -dinitrourea were an alysed by: TG, DSC, ignition test in Wood's metal bath, NMR, MS, FT-IR, gas pycnometry and BAM impact and friction sensitivity tests. N,N ' -Dinitroure a was found to have a very high density and positive oxygene balance. It wa s, however, found to be sensitive both to impact and friction.