Open main menu

Cyclohexane is the cycloalkane molecule with the formula C
6
H
12
, with 6 carbon atoms connected to each other in a ring shape, and each connected to two hydrogen atoms. It is used when making adipic acid and caprolactam, which can them be used to make nylon. It has no color and is flammable.

Cyclohexane
Cyclohexane
3D structure of a cyclohexane molecule
Skeletal formula of cyclohexane in its chair conformation
Ball-and-stick model of cyclohexane in its chair conformation
Names
Preferred IUPAC name
Cyclohexane[2]
Other names
Hexanaphthene (archaic)[1]
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.003.461
KEGG
PubChem {{{value}}}
UNII
SMILES {{{value}}}
Properties
C6H12
Molar mass 84.16 g·mol−1
Appearance Colorless liquid
Odor Sweet, gasoline-like
Density 0.7781 g/mL, liquid
Melting point 6.47 °C (43.65 °F; 279.62 K)
Boiling point 80.74 °C (177.33 °F; 353.89 K)
Immiscible
Solubility Soluble in ether, alcohol, acetone
Miscible with olive oil
Vapor pressure 78 mmHg (20 °C)[3]
-68.13·10−6 cm3/mol
1.42662
Viscosity 1.02 cP at 17 °C
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-156 kJ/mol
Std enthalpy of
combustion
ΔcHo298
-3920 kJ/mol
Hazards
EU classification Flammable F Template:Hazchem Xn Dangerous for the Environment (Nature) N
NFPA 704

NFPA 704.svg

3
1
0
 
R-phrases R11, R38, R65, R67, R50/53
S-phrases (S2), S9, S16, S25, S33, S60, S61, S62
Explosive limits 1.3%-8%[3]
U.S. Permissible
exposure limit (PEL)
TWA 300 ppm (1050 mg/m3)[3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☑Y verify (what is ☑Y☒N ?)
Infobox references

ReferencesEdit

  1. Hexanaphthene Archived 2018-02-12 at the Wayback Machine, dictionary.com
  2. "Front Matter". Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. pp. P001–P004. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.
  3. 3.0 3.1 3.2 "NIOSH Pocket Guide to Chemical Hazards #0163". National Institute for Occupational Safety and Health (NIOSH).