2,4-Dinitrotoluene

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2,4-Dinitrotoluene
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Names
IUPAC name
1-methyl-2,4-dinitro benzene
Other names
Dinitrotoluol, Methyldinitrobenzene
Identifiers
121-14-2 YesY
ChEBI CHEBI:920 YesY
ChEMBL ChEMBL259865 YesY
ChemSpider 8150 YesY
Jmol 3D model Interactive image
KEGG C11006 YesY
PubChem 8461
UN number Molten: 1600
Solid or liquid: 2038
  • InChI=1S/C7H6N2O4/c1-5-2-3-6(8(10)11)4-7(5)9(12)13/h2-4H,1H3 YesY
    Key: RMBFBMJGBANMMK-UHFFFAOYSA-N YesY
  • InChI=1/C7H6N2O4/c1-5-2-3-6(8(10)11)4-7(5)9(12)13/h2-4H,1H3
    Key: RMBFBMJGBANMMK-UHFFFAOYAC
  • Cc1ccc(cc1[N+](=O)[O-])[N+](=O)[O-]
Properties
C7H6N2O4
Molar mass 182.134 g/mol
Appearance Pale yellow to orange crystalline solid
Density 1.52 g/cm3[1]
Melting point 70 °C (158 °F; 343 K)[1]
Boiling point Decomposes at 250–300 °C[1]
Vapor pressure 1 mmHg (20°C)[2]
Vapor pressure {{{value}}}
Explosive data
Shock sensitivity Insensitive
Friction sensitivity Very low
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY verify (what is YesYN ?)
Infobox references

2,4-Dinitrotoluene (DNT) or dinitro is an organic compound with the formula C7H6N2O4. 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.[3]

Applications

Most DNT is used in the production of toluene diisocyanate, which is used to produce flexible polyurethane foams. DNT is hydrogenated to produce 2,4-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.[4] 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[2] 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 threshold limit value (TLV) of 1.5 mg/m3.[5] 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. 1.0 1.1 1.2 Record of 2,4-Dinitrotoluene in the GESTIS Substance Database of the IFA, accessed on 9. October 2007
  2. 2.0 2.1 Cite error: Invalid <ref> tag; no text was provided for refs named PGCH
  3. Lua error in package.lua at line 80: module 'strict' not found.
  4. Lua error in package.lua at line 80: module 'strict' not found.
  5. NIOSH Pocket Guide to Chemical Hazards - Dinitroluene

External links

  • Media related to Lua error in package.lua at line 80: module 'strict' not found. at Wikimedia Commons