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Table 1: The characteristic of the four kinds of explosive.

Name Formula Appearance Theory velocity (m/s) Theory density (g/cm3) Actual density (g/cm3) Relative density (%) Actual velocity (m/s) Ammonium Nitrate NH4NO3 Hoariness grain 3500 1.10 0.786 71.5 2800 Urea Nitrate CH5N3O4 White crystals 4190 1.69 0.786 46.5 3100 TNT C7H5N3O6 Light yellow powder 6700 1.60 0.786 49.1 5000 RDX (CH2NNO2)3 White powder 8400 1.79 0.786 43.9 6000