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What advantages made TNT useful as a military high explosive?

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coal miner loading a drill hole with an explosive — explosive A coal miner loading a drill hole with a water gel explosive called Tovex.

Trinitrotoluene (TNT) is considered a premier military high explosive primarily due to its safety and handling characteristics. Its most valuable property is the wide margin between its melting point (82° C) and its decomposition temperature (240° C). This allows the substance to be safely melted in steam-heated vessels and poured into shell casings or mixed as a slurry with other explosives.12

Additionally, TNT is relatively insensitive to shock, meaning it cannot be exploded without the use of a detonator. While this insensitivity can be a drawback in some applications, it makes the explosive much safer to transport and handle during military operations and demolitions. These combined factors—stability, ease of casting, and reliability—have made it a favored chemical explosive for munitions.21