Experimental minimum burning pressures (MBP) of emulsions with solution phase containing ammonium nitrate/water, ammonium nitrate/sodium nitrate/water, and ammonium nitrate/sodium nitrate/sodium perchlorate/water are investigated. A correlation is proposed to relate the MBP's with the combustion temperatures. The formulations containing sodium nitrate or sodium perchlorate have much lower MBP's and can be accounted for by an activation energy of 150.7kJmol(-1) obtained from literature for ingredients having catalyzing effects on the reaction of ammonium nitrate, e.g. sodium nitrate. The ammonium nitrate/water formulations have a higher activation energy of 173.4kJmol(-1) deduced from an analysis of the data. The MBP vs. combustion temperature plot is linearized by a multiplication factor to the MBP that includes the activation energy of the corresponding system. This allows the MBP to be predicted from combustion temperatures determined from the formulations and the corresponding activation energy.