This paper describes a new method for prediction of impact sensitivity of nitroaliphatic, nitroaliphatic containing other functional groups and nitrate explosives. The new procedure is based on some structural parameters of CaHbNcOd explosives. Three essential parameters would be needed in this scheme which contain a + b/2 - d and the number of nitrogens as well as the number of R-C(NO2)(2)-CH2- structural parameters attached to oxygen of carboxylate functional groups where R is alkyl groups. The results are compared with experimental data and some empirical correlations. Predicted impact sensitivities for 58 explosives have a root mean square (rms) of deviation from experiment of 27 cm, which show good agreement with respect to measured values as compared to previous empirical models. (C) 2007 Elsevier B.V. All rights reserved.