Cyclohexane
Cyclohexane is an organic compound with the molecular formula C6H12.
- Formula
- C6H12
- Molar mass
- 84.16 g/mol
- Also known as
- Hexamethylene, Hexahydrobenzene, Hexanaphthene, Cyclohexan, Cykloheksan, Benzene, hexahydro-
Overview
Cyclohexane is an organic compound with the molecular formula C6H12.
Identifiers
- Formula
- C6H12
- Molar mass
- 84.16 g/mol
- Also known as
- Hexamethylene, Hexahydrobenzene, Hexanaphthene, Cyclohexan, Cykloheksan, Benzene, hexahydro-
Chemical identifiers
- SMILES
- C1CCCCC1
- InChI
- InChI=1S/C6H12/c1-2-4-6-5-3-1/h1-6H2
- PubChem CID
- 8078
Properties
- Melting Point
- 6.47 °C
- Boiling Point
- 80.7 °C at 760 mm Hg
- Relative density (water = 1)
- Relative density (water = 1): 0.8
- Water solubility
- In water, 55 mg/L at 25 °C
Diagnostic tests
Saturated-hydrocarbon bromine control
- Reagent
- prepared dilute bromine solution in hexane
- Conditions
- Brief matched comparison without ultraviolet initiation.
- Positive observation
- Rapid colour loss would suggest a reactive impurity or different conditions.
- Negative observation
- Bromine colour persists over the initial comparison.
- Interpretation
- Cyclohexane has no alkene double bond for rapid addition.
- Scope
- Expected negative for cyclohexane in the unsaturation test.
- Limitations
- Light-initiated radical substitution is a different process; avoid interpreting long exposures as this comparison.
- Evidence
- reference experiment
Connected reactions
- Ring hydrogenation: Benzene → Cyclohexane
Benzene gives cyclohexane through ring hydrogenation.
References
- PubChem Compound Summary: Cyclohexane (CID 8078)National Center for Biotechnology Information · PubChem
Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.
- Hazardous Substances Data Bank (HSDB): Cyclohexane — melting pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/8078#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 485
- Hazardous Substances Data Bank (HSDB): Cyclohexane — boiling pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/8078#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 485
- ILO-WHO International Chemical Safety Cards (ICSCs): Cyclohexane — densityILO-WHO International Chemical Safety Cards (ICSCs)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/8078#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred.
- Hazardous Substances Data Bank (HSDB): Cyclohexane — solubilityHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/8078#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Yalkowsky, S.H., He, Yan, Jain, P. Handbook of Aqueous Solubility Data Second Edition. CRC Press, Boca Raton, FL 2010, p. 291
- Testing for unsaturation with bromine on a microscaleRoyal Society of Chemistry · RSC Education
Source-supported qualitative reference observations.