Jump to content

TNT: Difference between revisions

From Wikipedia, the free encyclopedia
Browse history interactively
← Previous editNext edit →
Content deleted Content added
VisualWikitext
m Reverted 1 edit by 24.234.138.203 identified as vandalism to last revision by Kristen Eriksen. (TW)
No edit summary
Line 176: Line 176:
[[uk:Тринітротолуол]]
[[uk:Тринітротолуол]]
[[zh:三硝基甲苯]]
[[zh:三硝基甲苯]]
BOOOOOOOOOOOOOOM

Revision as of 21:22, 14 January 2009

TNT
Names
IUPAC names
2-methyl-1,3,5-trinitrobenzene
Other names
2,4,6-Trinitrotoluene,
TNT, Trilite, Tolite, Trinol, Trotyl, Tritolo, Tritolol, Triton, Tritone, Trotol, Trinitrotoluol,
2,4,6-Trinitromethylbenzene
Identifiers
3D model (JSmol)
Abbreviations TNT
ECHA InfoCard 100.003.900 Edit this at Wikidata
UN number 0209 – Dry or wetted with < 30% water
0388, 0389 – Mixtures with trinitrobenzene, hexanitrostilbene
  • CC1=C(C=C(C=C1[N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-] =]
Properties
C7H5N3O6
Molar mass 227.131 g/mol
Appearance Pale yellow. Loose "needles" before melt-casting. A solid block after being poured into a casing.
Density 1.654 g/cm³
Melting point 80.35 °C
Boiling point 295 °C
130 mg/L of H2O (20 °C)
Solubility ether
acetone
benzene
pyridine
Explosive data
Shock sensitivity Insensitive
Friction sensitivity Insensitive to 353 N
RE factor 1.00
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propaneInstability 4: Readily capable of detonation or explosive decomposition at normal temperatures and pressures. E.g. nitroglycerinSpecial hazards (white): no code
3
4
4
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Trinitrotoluene (TNT) is a chemical compound with the formula C6H2(NO2)3CH3. This yellow-coloured solid is a reagent (reactant) in chemistry but is best known as a useful explosive material with convenient handling properties. The explosive yield of TNT is considered the standard measure of strength of bombs and other explosives. In chemistry, TNT is used to generate charge transfer salts.

Preparation

TNT is synthesized in a three-step process.[1] First, toluene is nitrated with a mixture of sulfuric and nitric acid to produce mono-nitrotoluene or MNT. The MNT is then nitrated to dinitrotoluene or DNT. In the final step, the DNT is nitrated to trinitrotoluene or TNT. The acids used in the manufacture of TNT are recycled and reused.

Applications

TNT is one of the most commonly used explosives for military and industrial applications. It is valued because of its insensitivity to shock and friction, which reduces the risk of accidental detonation. TNT melts at 80 °C (176 °F), far below the temperature at which it will spontaneously detonate, allowing it to be poured as well as safely combined with other explosives. TNT neither absorbs nor dissolves in water, which allows it to be used effectively in wet environments. Additionally, it is relatively stable when compared to other high explosives.

Although blocks of TNT are available in various sizes (e.g. 250 g, 500 g, 1,000 g and even 20 kg[2]), it is more commonly encountered in synergistic explosive blends comprising a variable percentage of TNT plus other ingredients. Examples of explosive blends containing TNT include:

Explosive character

It is a common misconception that TNT and dynamite are the same, or that dynamite contains TNT. In fact, whereas TNT is a specific chemical compound, dynamite is an absorbent mixture soaked in nitroglycerin that is compressed into a cylindrical shape and wrapped in paper.

Upon detonation, TNT decomposes as follows:

2 C7H5N3O6 → 3 N2 + 5 H2O + 7 CO + 7 C

The reaction is exothermic but has a high activation energy. Because of the production of carbon, TNT explosions have a sooty appearance.

For many years, TNT used to be the reference point for the Figure of Insensitivity. TNT has a rating of exactly 100 on the F of I scale. However, the reference has since been changed to a more sensitive explosive called RDX, which has an F of I of 80.

History

TNT was first prepared in 1863 by German chemist Joseph Wilbrand[3] and originally used as a yellow dye. Its potential as an explosive was not appreciated for several years mainly because it was so difficult to detonate and because it was less powerful than alternatives. TNT can be safely poured when liquid into shell cases, and is so insensitive that in 1910, it was exempted from the UK's Explosives Act 1875 and was not considered an explosive for the purposes of manufacture and storage.[citation needed]

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. The British started replacing lyddite with TNT in 1907. TNT is still widely used by the United States military and construction companies around the world. The majority of TNT currently used by the US military is manufactured by Radford Army Ammunition Plant near Radford, Virginia.

HE 120mm mortar shell fitted with proximity fuze. Manufactured in January 2006 and marked to indicate a 100% TNT filling

Safety and toxicity

TNT is poisonous, and skin contact can cause skin irritation, causing the skin to turn a bright yellow-orange color. During the First World War, munition workers who handled the chemical found that their skin turned bright yellow, which resulted in their acquiring the nickname "canary girls" or simply "canaries." People exposed to TNT over a prolonged period tend to experience anemia and abnormal liver functions. Blood and liver effects, spleen enlargement and other harmful effects on the immune system have also been found in animals that ingested or breathed trinitrotoluene. There is evidence that TNT adversely affects male fertility, and TNT is listed as a possible human carcinogen[4]. Consumption of TNT produces red urine through the presence of breakdown products and not blood as sometimes believed.[5]

Some military testing grounds are contaminated with TNT. Wastewater from munitions programs including contamination of surface and subsurface waters may be colored pink because of the presence of TNT. Such contamination, called "pink water", may be difficult and expensive to remedy.

See also

References

  1. ^ Army TM 9-1300-214, p. 8-83
  2. ^ Industria de Material Belico do Brasil
  3. ^ J. Wilbrand (1863). "Notiz über Trinitrotoluol". Annalen der Chemie und Pharmacie. 128 (2): 178–179. doi:10.1002/jlac.18631280206.
  4. ^ Toxicological Profile for 2,4,6-Trinitrotoluene
  5. ^ "2,4,6-Trinitrotoluene". Agency for Toxic Substances and Disease Registry. September 1996. Retrieved 2008-02-02.

BOOOOOOOOOOOOOOM

Retrieved from "https://wiki.riteme.site/w/index.php?title=TNT&oldid=264118636"