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The meaning of «tnt»

Trinitrotoluene (/ˌtraɪˌnaɪtroʊˈtɒljuiːn/)[4][5] more commonly known as TNT, or more specifically 2,4,6-trinitrotoluene, is a chemical compound with the formula C6H2(NO2)3CH3. This yellow solid is occasionally used as a reagent in chemical synthesis, but it is best known as an explosive material with convenient handling properties. The explosive yield of TNT is considered to be the standard comparative convention of bombs and asteroid impacts. In chemistry, TNT is used to generate charge transfer salts.

TNT was first prepared in 1863 by German chemist Julius Wilbrand[6] and originally used as a yellow dye. Its potential as an explosive was not recognized for three decades, mainly because it was too difficult to detonate because it was less sensitive than alternatives. Its explosive properties were first discovered by another German chemist, Carl Häussermann, in 1891.[7] TNT can be safely poured when liquid into shell cases, and is so insensitive that it was exempted from the UK's Explosives Act 1875 and was not considered an explosive for the purposes of manufacture and storage.[8]

The German armed forces adopted it as a filling for artillery shells in 1902. TNT-filled armour-piercing shells would explode after they had penetrated the armour of British capital ships, whereas the British Lyddite-filled shells tended to explode upon striking armour, thus expending much of their energy outside the ship.[8] The British started replacing Lyddite with TNT in 1907.[9]

The United States Navy continued filling armour-piercing shells with explosive D after some other nations had switched to TNT, but began filling naval mines, bombs, depth charges, and torpedo warheads with burster charges of crude grade B TNT with the color of brown sugar and requiring an explosive booster charge of granular crystallized grade A TNT for detonation. High-explosive shells were filled with grade A TNT, which became preferred for other uses as industrial chemical capacity became available for removing xylene and similar hydrocarbons from the toluene feedstock and other nitrotoluene isomer byproducts from the nitrating reactions.[10]

Trinitrotoluene melting at 81 °C (178 °F)

M795 artillery shells with fuzes fitted, labelled to indicated a filling of TNT

M107 artillery shells. All are labelled to indicate a filling of "Comp B" (mixture of TNT and RDX) and have fuzes fitted

Analysis of TNT production by branch of the German army between 1941 and the first quarter of 1944 shown in thousands of tons per month

Detonation of the 500-ton TNT explosive charge as part of Operation Sailor Hat in 1965. The passing blast-wave left a white water surface behind and a white condensation cloud is visible overhead.

In industry, TNT is produced in a three-step process. First, toluene is nitrated with a mixture of sulfuric and nitric acid to produce mononitrotoluene (MNT). The MNT is separated and then renitrated to dinitrotoluene (DNT). In the final step, the DNT is nitrated to trinitrotoluene (TNT) using an anhydrous mixture of nitric acid and oleum. Nitric acid is consumed by the manufacturing process, but the diluted sulfuric acid can be reconcentrated and reused. After nitration, TNT is stabilized by a process called sulfitation, where the crude TNT is treated with aqueous sodium sulfite solution to remove less stable isomers of TNT and other undesired reaction products. The rinse water from sulfitation is known as red water and is a significant pollutant and waste product of TNT manufacture.[11]

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