Results are given of investigations dealing with the preparation and properties of some aliphatic nitramines. Several compounds related to Haleite were prepared. N-methyl-ethylene-dinitramine, N,N-dimethyl-ethylenedinitramine, and dinitropiperazine were obtained by alkylating ethylene-dinitramine. The effect of cold absolute nitric acid on nitramines was studied, and the halogenation of ethylenedinitramine and its monoethyl derivative with iodine proved to be unsuccessful. One of the objects of this study was to prepare the nitramine analogs of several known nitrate-ester explosives, and this was accomplished for several compounds listed. The most important outgrowth of the research on new nitramines has been the development of mixed nitrate esters and compounds of the NENA type, which are being investigated as plasticizers for nitrocellulose.