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Propellants and explosives contain both oxidizer and fuel in their compositions and they are both classed as combustible materials. The chemical compositions of propellants and explosives are essentially the same; consequently some propellants can be used as explosives, and some explosives can be used as propellants. In general, propellants generate combustion gases by the deflagration process, whereas explosives generate these gases by deflagration or detonation. The combustion process of propellants is usually subsonic, whereas the combustion process of explosives during detonation is supersonic.

The solution was poured into water and a precipitate was obtained which Jousselin called 'nitrosoguanidine', but which was later determined to be nitroguanidine by Thiele. 0 products. The gases from the decomposition of nitroguanidine are far less erosive than gases from other similar explosives. Nitroguanidine is soluble in hot water and alkalis, and insoluble in ethers and cold water. It has a high velocity of detonation, a low heat and temperature of explosion, and a high density. 13. Nitroguanidine can be used as a secondary explosive but is also suitable for use in flashless propellants as it possesses a low heat and temperature of explosion.

TNT has a number of advantages which have made it widely used in military explosives before World War I and up to the present time. 11 Summary of the development of TNT (2,4,6-trinitrotoEuene) throughout the 19th and 20th centuries Date Developments 1837 1841 1863 1870 Pelletier and Walter first prepared toluene. Mononitrated toluene was prepared. Wilbrand prepared crude TNT. Beilstein and Kuhlberg discovered the isomer 2,4,5-trinitrotoluene. Hepp prepared pure TNT (2,4,6-trinitrotoluene). The 2,3,4-trinitrotoluene isomer prepared.

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