Dodecane

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Dodecane

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Template:Longitem	1697175
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EC Number	Template:Unbulleted list
Template:Longitem	201408
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MeSH	n-dodecane
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Template:Longitem	Template:Chembox Elements/molecular formula
Molar mass	Template:Chem molar mass
Appearance	Colorless liquid
Odor	Gasoline-like to odorless
Density	0.7495 g mL−1 at 20 °C
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log P	6.821
Vapor pressure	18 Pa (at 25 °C)
Template:Longitem	1.4 nmol Pa−1 kg−1
Template:Longitem	1.421
Viscosity	1.34 mPa s
Template:Longitem	376.00 J K−1 mol−1
Template:Longitem	490.66 J K−1 mol−1
Template:Longitem	−353.5–−350.7 kJ mol−1
Template:Longitem	−7901.74 kJ mol−1
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Dodecane (also known as dihexyl, bihexyl, adakane 12, or duodecane) is an oily liquid n-alkane hydrocarbon with the chemical formula C₁₂H₂₆ (which has 355 isomers).

It is used as a solvent, distillation chaser, and scintillator component. It is used as a diluent for tributyl phosphate (TBP) in nuclear reprocessing plants.

Combustion reaction

The combustion reaction of dodecane is as follows:

C₁₂H₂₆(l) + 18.5 O₂(g) → 12 CO₂(g) + 13 H₂O(g)

ΔH° = −7513 kJ

One litre of fuel needs about 15 kg of air to burn (2.6 kg of oxygen), and generates 2.3 kg (or 1.2 m³) of CO₂ upon complete combustion.

Jet fuel surrogate

In recent years, n-dodecane has garnered attention as a possible surrogate for kerosene-based fuels such as Jet-A, S-8, and other conventional aviation fuels. It is considered a second-generation fuel surrogate designed to emulate the laminar flame speed, largely supplanting n-decane, primarily due to its higher molecular mass and lower hydrogen-to-carbon ratio which better reflect the n-alkane content of jet fuels.

See also

• Higher alkanes
• Kerosene
• List of isomers of dodecane

External links

• Material Safety Data Sheet for Dodecane
• Dodecane, Dr. Duke's Phytochemical and Ethnobotanical Databases