The reactions between butanone and hydrogen peroxide, both catalysed and un-catalysed, were investigated and spectral and sensitiveness data reported. The major product of the un-catalysed reaction, 2-hydroxy,2-hydroperoxybutane, displayed a Figure of Insensitiveness (F of I) of 10, Temperature of Ignition (T of I) of 132 degrees C, and initiated when 128 N of frictional force or an electrostatic discharge (ESD) of 4.5 J was applied. Differential scanning calorimetric analyses revealed an onset of decomposition at 128 degrees C, peak maximum of 140 degrees C, and decomposition energy of 203 J g-1. The major product of the cooled (5 degrees C) acid catalysed reaction between butanone and hydrogen peroxide, 2,2'-dihydroperoxy-2,2'-dibutyl peroxide, displayed a F of I of<10, T of I of 110 degrees C and initiated upon application of 5 N of friction or a 0.45 J ESD. Calorimetry showed a melt at 38.3 degrees C, an onset of exothermic decomposition at 127 degrees C and the evolution of 1292 J g-1. The major product of the raised temperature (20 degrees C) acid catalysed synthesis, 1,4,7-trimethyl-1,4,7-triethyl-1,4,7-cyclononatriperoxane, displayed F of I of<10 and initiated upon application of 5 N of friction or a 0.45 J ESD. Calorimetry revealed an onset to melting at 28.9 degrees C, an onset to thermal decomposition at 128 degrees C, and decomposition energy of 1438 J g-1.