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Topic summary

Cyclohexane

Cyclohexane
Names Preferred IUPAC name
Cyclohexane
Other names
Hexanaphthene (archaic)
Identifiers
3D model (JSmol)
1900225 ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard100.003.4611662 KEGG
RTECS number
  • GU6300000
UNII
UN number1145
  • InChI=1S/C6H12/c1-2-4-6-5-3-1/h1-6H2
    Key: XDTMQSROBMDMFD-UHFFFAOYSA-N
  • InChI=1/C6H12/c1-2-4-6-5-3-1/h1-6H2
    Key: XDTMQSROBMDMFD-UHFFFAOYAZ
  • C1CCCCC1
Properties C6H12Molar mass84.162 g·mol Appearance Colourless liquid OdorSweet, gasoline-like Density0.7739 g/ml (liquid); 0.996 g/ml (solid) Melting point6.47 °C (43.65 °F; 279.62 K) Boiling point80.74 °C (177.33 °F; 353.89 K) Immiscible SolubilitySoluble in ether, alcohol, acetoneVapor pressure78 mmHg (20 °C) −68.13·10 cm/mol 1.42662 Viscosity1.02 cP at 17 °C Hazards GHS labelling: DangerH225, H304, H315, H336P210, P233, P240, P241, P242, P243, P261, P264, P271, P273, P280, P301+P310, P302+P352, P303+P361+P353, P304+P340, P312, P321, P331, P332+P313, P362, P370+P378, P391, P403+P233, P403+P235, P405, P501NFPA 704 (fire diamond)
1
3
0
Flash point−20 °C (−4 °F; 253 K) 245 °C (473 °F; 518 K) Explosive limits1.3–8% Lethal dose or concentration (LD, LC): 12705 mg/kg (rat, oral)
813 mg/kg (mouse, oral) 17,142 ppm (mouse, 2 h)
26,600 ppm (rabbit, 1 h) NIOSH (US health exposure limits):
PEL (Permissible)
TWA 300 ppm (1050 mg/m)
REL (Recommended)
TWA 300 ppm (1050 mg/m)
IDLH (Immediate danger)
1300 ppm Thermochemistry −156 kJ/mol −3920 kJ/mol Related compounds
Related cycloalkanes
Cyclopentane
Cycloheptane
Related compounds
Cyclohexene
BenzeneSupplementary data page Cyclohexane (data page)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cyclohexane is a cycloalkane with the molecular formulaC6H12. Cyclohexane is non-polar. Cyclohexane is a colourless, flammable liquid with a distinctive detergent-like odor, reminiscent of cleaning products (in which it is sometimes used). Cyclohexane is mainly used for the industrial production of adipic acid and caprolactam, which are precursors to nylon.

Cyclohexyl (C6H11) is the alkylsubstituent of cyclohexane and is abbreviated Cy.

Wikipedia source