Cyclohexane
Encyclopedia : C : CY : CYC : Cyclohexane
| Cyclohexane | |
|---|---|
| |
| General | |
| Molecular formula | C6H12 |
| SMILES | C1CCCCC1 |
| Molar mass | 84.16 g/mol |
| Appearance | Colorless liquid |
| CAS number | [110-82-7] |
| Properties | |
| Density and phase | 0.779 g/ml, liquid |
| Solubility in water | Immiscible |
| Solubility in ethanol | Miscible |
| Melting point | 6.55 °C |
| Boiling point | 80.74 °C |
| Viscosity | 1.02 cP at 17 °C |
| Index of refraction, nD | 1.423 |
| Thermodynamic data | |
| Standard enthalpy of formation ΔfH | -156 kJ/mol |
| Standard enthalpy of combustion ΔcH | -3920 kJ/mol |
| Standard molar entropy S | ? J.K−1.mol−1 |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Flammable (F) Harmful (Xn) Dangerous for the environment (N) |
| NFPA 704 |   
|
| R-phrases | R11, R38, R65, R67, R50/53 |
| S-phrases | S2, S9, S16, S25, S33, S60, S61, S62 |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Regulatory data | Flash point, RTECS number, etc. |
| Related compounds | |
| Related cycloalkanes | Cyclopentane Cycloheptane |
| Related compounds | Cyclohexene |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) [Chemical infoboxInfobox disclaimer and references] | |
Cyclohexane is a cycloalkane with the molecular formula C6H12. Cyclohexane is used as a nonpolar solvent for the chemical industry, and also as a raw material for the industrial production of adipic acid and caprolactam, both of which are intermediates used in the production of nylon.
Chemical conformation
To reduce ring strain, cyclohexane adopts a three-dimensional structure known as the chair conformation. Half of the substituents are in the plane of the ring (equatorial) while the other half are perpendicular to the plane (axial). Other conformations are boat, bent chair and twisted boat.
See also
External links
- [International Chemical Safety Card 0242]
- [National Pollutant Inventory - Cyclohexane fact sheet]
- [NIOSH Pocket Guide to Chemical Hazards]
- [Cyclohexane@3Dchem]
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