Chemical explosives : An explosive (solid/liquid/gas) which produce high temperature and pressure released within a fraction of a second, when explosive action is initiated.

eg : - Gun powder (KNO3, 10 th c , China), Dynamite ( C3H5(ONO2)3 ), TNT (Tri Nitro Toluene), RDX (Research Development Explosive), PETN (Penta Erythetol Tetra Nitrate
C(CH2ONO2)4 ).