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Cyclooctanol

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Cyclooctanol
Cyclooctanol structural formula
Names
IUPAC name
Cyclooctanol[1]
Other names
  • Cyclooctyl alcohol[1]
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
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UNII
Properties
C
8
H
15
OH
Molar mass 128.215 g·mol−1
Appearance Colorless viscous liquid[2][3]
Odor Pleasant[3]
Density 0.974 g/cm3[4]
Melting point 15 °C (59 °F; 288 K)[5]
Boiling point 209 °C (408 °F; 482 K)[2]
Slightly[3], 6.576 g/l[5]
Solubility Soluble in organic solvents such as ethanol and diethyl ether.[3] Miscible with acetone.[6]
log P 2.09160[4]
Vapor pressure 0.1 hPa at 20 °C (68 °F)[5]
1.486[6]
Hazards
Main hazards May cause serious eye irritation[5]
GHS pictograms GHS07: Harmful
GHS Signal word
<abbr class="abbr" title="Error in hazard statements">HH227, <abbr class="abbr" title="Error in hazard statements">HH302, <abbr class="abbr" title="Error in hazard statements">HH315, <abbr class="abbr" title="Error in hazard statements">HH319, <abbr class="abbr" title="Error in hazard statements">HH335
<abbr class="abbr" title="Error in hazard statements">PP210, <abbr class="abbr" title="Error in hazard statements">PP261, <abbr class="abbr" title="Error in hazard statements">PP264, <abbr class="abbr" title="Error in hazard statements">PP264+P265, <abbr class="abbr" title="Error in hazard statements">PP270, <abbr class="abbr" title="Error in hazard statements">PP271, <abbr class="abbr" title="Error in hazard statements">PP280, <abbr class="abbr" title="Error in hazard statements">PP301+P317, <abbr class="abbr" title="Error in hazard statements">PP302+P352, <abbr class="abbr" title="Error in hazard statements">PP304+P340, <abbr class="abbr" title="Error in hazard statements">PP305+P351+P338, <abbr class="abbr" title="Error in hazard statements">PP319, <abbr class="abbr" title="Error in hazard statements">PP321, <abbr class="abbr" title="Error in hazard statements">PP330, <abbr class="abbr" title="Error in hazard statements">PP332+P317, <abbr class="abbr" title="Error in hazard statements">PP337+P317, <abbr class="abbr" title="Error in hazard statements">PP362+P364, <abbr class="abbr" title="Error in hazard statements">PP370+P378, <abbr class="abbr" title="Error in hazard statements">PP403, <abbr class="abbr" title="Error in hazard statements">PP403+P233, <abbr class="abbr" title="Error in hazard statements">PP405, <abbr class="abbr" title="Error in hazard statements">PP501
Flash point 86 °C (187 °F; 359 K)[2]
Lethal dose or concentration (LD, LC):
735 mg/kg (oral, rat)[2]
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Cyclooctanol is an organic compound with the formula (CH
2
)
7
CHOH or C
8
H
15
OH. It is a colorless oily liquid with a pleasant odor. The molecule is related to 8-membered cyclooctane ring in which one of its hydrogen atoms is replaced by a hydroxyl group.

Synthesis

It can be obtained by hydrolysis of cyclooctyl formate[7] or by oxidation of cyclooctane.[4]

Properties

Under high pressure, new solid phase of cyclooctanol (phase III) is discovered and characterized as a normal crystal phase, and all other solid phases (I, II, IV) are characterized as plastic crystal phases.[8]

Its chemical properties include the ability to undergo typical alcohol reactions, such as esterification and oxidation, making it versatile in various chemical processes.[3]

Uses

Cyclooctanol is used as a solvent and as an intermediate in organic synthesis, especially in the production of various chemical compounds. Additionally, it has applications in the fragrance industry due to its pleasant odor.[3] It is a starting chemical used for the synthesis of cylooctanone by using a chromic acid reagent as an oxidizing agent.[6]

Reactions

Cyclooctanol reacts with diethylaminosulfur trifluoride to give fluorocyclooctane and cyclooctene.[9]

Safety

Cyclooctanol is difficult to ignite.[5] Its vapors are heavier than air and may spread along floors. Forms explosive mixtures with air on intense heating.[2] While it may cause irritation upon contact with skin and eyes, it is generally considered to have low toxicity.[3] May cause irritations of mucous membranes in the mouth, pharynx, oesophagus and gastrointestinal tract. Violent chemical reactions are possible with strong oxidizing agents, acid halides and acid anhydrides.[2]

References

  1. 1.0 1.1 PubChem. "Cyclooctanol". pubchem.ncbi.nlm.nih.gov. Retrieved 25 April 2026.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Sigma-Aldrich. "Cyclooctanol for synthesis". www.sigmaaldrich.com. Retrieved 26 April 2026.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Cymit Química. "CAS 696-71-9: Cyclooctanol". cymitquimica.com. Retrieved 29 April 2026.
  4. 4.0 4.1 4.2 ChemSrc. "cyclooctanol". www.chemsrc.com. Retrieved 29 April 2026.
  5. 5.0 5.1 5.2 5.3 5.4 GESTIS. "Cyclooctanol". gestis.dguv.de. Retrieved 30 April 2026.
  6. 6.0 6.1 6.2 ThermoFisher. "Cyclooctanol, 97%". www.thermofisher.com. Retrieved 29 April 2026.
  7. Sommer, Tomáš; Zapletal, Martin; Trejbal, Jiří (2018). "Production of cyclic alcohols". Chemical Papers. 72 (10): 2397–2412. Bibcode:2018ChPap..72.2397S. doi:10.1007/s11696-018-0508-5.
  8. Andersson, Ove; Ross, Russell G. (1990). "Thermal conductivity, heat capacity and phase diagram of cyclooctanol in liquid, solid and glassy crystal states under high pressure". Molecular Physics. 71 (3): 523–539. Bibcode:1990MolPh..71..523A. doi:10.1080/00268979000101951.
  9. Middleton, William J. (1975). "New fluorinating reagents. Dialkylaminosulfur fluorides". The Journal of Organic Chemistry. 40 (5): 574–578. Bibcode:1975JOrgC..40..574M. doi:10.1021/jo00893a007.


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