Dodecane

Not to be confused with Dodecahedrane.

Dodecane

Names
Preferred IUPAC name

Dodecane[1]

Identifiers

CAS Number

* 112-40-3 Y

3D model (JSmol)

* Interactive image

Beilstein Reference

| 1697175
ChEBI |

* CHEBI:28817 Y

ChEMBL |

* ChEMBL30959 Y

ChemSpider |

* 7890 Y

DrugBank |

* DB02771 Y

ECHA InfoCard | 100.003.607
EC Number |

* 203-967-9

Gmelin Reference

| 201408
KEGG |

* C08374 Y

MeSH | n-dodecane

PubChem CID

* 8182

RTECS number |

* JR2125000

UNII |

* 11A386X1QH Y

CompTox Dashboard (EPA)

* DTXSID0026913

InChI

* InChI=1S/C12H26/c1-3-5-7-9-11-12-10-8-6-4-2/h3-12H2,1-2H3 Y

Key: SNRUBQQJIBEYMU-UHFFFAOYSA-N Y

SMILES

* CCCCCCCCCCCC

Properties

Chemical formula

| C12H26
Molar mass | 170.340 g·mol−1
Appearance  | Colorless liquid
Odor | Gasoline-like to odorless
Density | 0.7495 g mL−1 at 20 °C[2]
Melting point | −10.0 to −9.3 °C; 14.1 to 15.2 °F; 263.2 to 263.8 K
Boiling point | 214 to 218 °C; 417 to 424 °F; 487 to 491 K
log P | 6.821
Vapor pressure | 18 Pa (at 25 °C)[3]

Henry's law
constant (kH)

| 1.4 nmol Pa−1 kg−1

Refractive index (nD)

| 1.421
Viscosity | 1.34 mPa s
Thermochemistry

Heat capacity (C)

| 376.00 J K−1 mol−1

Std molar
entropy (S⦵298)

| 490.66 J K−1 mol−1

Std enthalpy of
formation (ΔfH⦵298)

| −353.5–−350.7 kJ mol−1

Std enthalpy of
combustion (ΔcH⦵298)

| −7901.74 kJ mol−1
Hazards
GHS labelling:

Pictograms

Signal word

| Danger

Hazard statements

| H304

Precautionary statements

| P301+P310, P331
NFPA 704 (fire diamond)  |

Flash point | 71 °C (160 °F; 344 K)

Autoignition
temperature

| 205 °C (401 °F; 478 K)
Explosive limits | 0.6%
Safety data sheet (SDS)  | hazard.com
Related compounds

Related alkanes

* Undecane
* Tridecane

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)

Infobox references

Chemical compound

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.[4]

## Combustion reaction

[edit]

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

[edit]

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

[edit]

* Higher alkanes
* Kerosene
* List of isomers of dodecane

## References

[edit]

1. ^ "n-dodecane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 4 January 2012.
2. ^ "Dodecane".
3. ^ "Dodecane".
4. ^ Rydberg, Jan (2004). Solvent Extraction Principles and Practice. Marcel Dekker. p. 524\. ISBN 0-8247-5063-2.

## External links

[edit]

* Caudwell, D.R.; Trusler, J.P.M.; Vesovic, V.; Wakeham, W.A. (2003-06-16). "The Viscosity and Density of n-Dodecane and n-Octadecane at Pressures up to 200 mPa and Temperatures up to 473 K" (PDF). NIST. Archived from the original (PDF) on 2006-10-09. Retrieved 2007-10-09.
* Material Safety Data Sheet for Dodecane
* Dodecane, Dr. Duke's Phytochemical and Ethnobotanical Databases

* v
* t
* e

Alkanes

* Methane (CH4)
* Ethane (C2H6)
* Propane (C3H8)
* Butane (C4H10)
* Pentane (C5H12)
* Hexane (C6H14)
* Heptane (C7H16)
* Octane (C8H18)
* Nonane (C9H20)
* Decane (C10H22)
* Undecane (C11H24)
* Dodecane (C12H26)
* Tridecane (C13H28)
* Tetradecane (C14H30)
* Pentadecane (C15H32)
* Hexadecane / Cetane (C16H34)
* Heptadecane (C17H36)
* Octadecane (C18H38)
* Nonadecane (C19H40)
* Icosane (C20H42)
* Heneicosane (C21H44)
* Tetracosane (C24H50)
* Nonacosane (C29H60)
* Hentriacontane (C31H64)

* Higher alkanes
* List of alkanes

Authority control databases: National |

* Germany

|

*[CID]: Compound ID
*[EPA]: U.S. Environmental Protection Agency
*[H304]: H304: May be fatal if swallowed and enters airways
*[P301+P310]: P301+P310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
*[P331]: P331: Do NOT induce vomiting.
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template