2,4-Dinitrotoluene
File:2,4-Dinitrotoluol.svg | |
File:Dinitrotoluene-3D-balls.png | |
Names | |
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IUPAC name
1-methyl-2,4-dinitro benzene
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PubChem CID
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Properties | |
C7H6N2O4 | |
Molar mass | 182.134 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Infobox references | |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
2,4-Dinitrotoluene (DNT) or Dinitro is an organic compound with the formula CH3C6H3)(NO2)2. This pale yellow crystalline solid is well known as a precursor to trinitrotoluene (TNT) but is mainly produced as a precursor to toluene diisocyanate.
Isomers of dinitrotoluene
Six isomers are possible for dinitrotoluene. The most common one is 2,4-dinitrotoluene.
The nitration of toluene gives sequentially mononitrotoluene, DNT, and finally TNT. 2,4-DNT is the principal product from dinitration, the other main product being about 30% 2,6-DNT. The nitration of 4-nitrotoluene gives 2,4-DNT.[2]
Applications
Most DNT is used in the production of toluene diisocyanate, which is used to produce flexible polyurethane foams. DNT is hydrogenated to produce toluenediamine, which in turn is phosgenated to give toluene diisocyanate. In this way, about 1.4 billion kilograms are produced annually, as of the years 1999-2000.[3] Other uses include the explosives industry. It is not used by itself as an explosive, but some of the production is converted to TNT.
Dinitrotoluene is frequently used as a plasticizer, deterrent coating, and burn rate modifier in propellants (e.g., smokeless gunpowders). As it is carcinogenic and toxic, modern formulations tend to avoid its use. In this application it is often used together with dibutyl phthalate.[citation needed]
Toxicity
Dinitrotoluenes are highly toxic with a TLV of 1.5 mg/m3. It converts hemoglobin into methemoglobin.
2,4 Dinitrotoluene is also a listed hazardous waste under 40 CFR 261.30. Its United States Environmental Protection Agency (EPA) hazardous waste Number is D030. The maximum concentration that may be contained to not have toxic characteristics is 0.13 mg/L.
References
- ↑ 1.0 1.1 1.2 Template:GESTIS
- ↑ Gerald Booth (2007). "Nitro Compounds, Aromatic". In: Ullmann's Encyclopedia of Industrial Chemistry. John Wiley & Sons: New York. doi:10.1002/14356007.a17_411
- ↑ Christian Six, Frank Richter "Isocyanates, Organic" in Ulmann's Encyclopedia of Industrial Chemistry, 2005 Wiley-VCH, Weinheim doi:10.1002/14356007.a14_611
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