 EGDN/ETN/NC systems are toxic to touch, quite sensitive to friction and impact, but generally slightly more powerful than C4 (Pcj of about 250 kbar and Edet of 5.3 MJ/Kg) and more powerful than Semtex (Pcj of about 220 kbar and Edet below 5 MJ/kg) with Pcj of about 250–270 kbar and Edet of about 6 MJ/kg.Note that different explosive softwares and different experimental tests will yield absolute detonation pressures that can vary by 5% or more with the relative proportions being maintained.Melt-cast ETN gives invalid results in the Hess test, i.e.