1,6-Hexanediol

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1,6-Hexanediol
1,6-Hexanediol.svg
Names
Preferred IUPAC name
Hexane-1,6-diol
Other names
Hexamethylene glycol; 1,6-Dihydroxyhexane; 1,6-Hexylene glycol; Hexamethylenediol; HDO
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.010.068 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 211-074-0
PubChem CID
RTECS number
  • MO2100000
UNII
  • InChI=1S/C6H14O2/c7-5-3-1-2-4-6-8/h7-8H,1-6H2 Yes check.svgY
    Key: XXMIOPMDWAUFGU-UHFFFAOYSA-N Yes check.svgY
  • OCCCCCCO
Properties
C6H14O2
Molar mass 118.176 g·mol−1
Density 0.967
Melting point 42 °C (108 °F; 315 K)
Boiling point 250 °C (482 °F; 523 K)
500g/L [1]
Solubility soluble in ethanol and acetone, slightly soluble in diethyl ether, insoluble in benzene. [2]
Hazards
Flash point 102 °C (216 °F; 375 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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1,6-Hexanediol is an organic compound with the formula (CH2CH2CH2OH)2. It is a colorless water-soluble solid. [3]

Contents

History and synthesis

W. H. Perkin Jr. and his graduate student Edward Haworth first prepared the compound in 1894 during their research on cyclohexane. They boiled 1,6-dibromohexane (which they were also the first to synthesize) with dilute potassium carbonate solution and named the product hexamethylene glycol. [4]

1,6-Hexanediol is industrially made by the hydrogenation of adipic acid or its esters. [3] [5] Laboratory preparation could be achieved by reduction of adipates with lithium aluminium hydride, although this method is impractical on a commercial scale.

Properties

As 1,6-hexanediol contains hydroxyl groups, it undergoes the typical chemical reactions of alcohols such as dehydration, substitution, and esterification. Oxidation with pyridinium chlorochromate gives adipaldehyde. [6]

Dehydration of 1,6-hexanediol gives oxepane, 2-methyltetrahydropyran and 2-ethyltetrahydrofuran. Corresponding thiophene and pyrrolidone can be made by reacting 1,6-hexanediol with hydrogen sulfide and ammonia respectively. [7]

Uses

1,6-Hexanediol is widely used for industrial polyester and polyurethane production. [3]

1,6-Hexanediol can improve the hardness and flexibility of polyesters as it contains a fairly long hydrocarbon chain. In polyurethanes, it is used as a chain extender, and the resulting modified polyurethane has high resistance to hydrolysis as well as mechanical strength, but with a low glass transition temperature.

It is also an intermediate to acrylics as a crosslinking agent, e.g. hexanediol diacrylate. [3] Unsaturated polyester resins have also been made from 1,6-hexanediol, along with styrene, maleic anhydride and fumaric acid. [7]

Uses to study biomolecular condensates

1,6-Hexanediol has been used to characterize biomolecular condensates. The material properties of condensates can be examined to determine if they are solid or liquid condensates. 1,6-Hexanediol has been reported to interfere with weak hydrophobic protein-protein or protein-RNA interactions that comprise liquid condensates. 1,6-Hexanediol has been reported to dissolve liquid but not solid condensates. [8] 2,5-Hexanediol and 1,4-butanediol have been observed to have minimal effect on behavior of disorderd proteins as compared to 1,6-hexanediol. [9] [10]

Safety

1,6-Hexanediol [11] has low toxicity and low flammability, and is generally considered as safe. It is not irritating to skin, but may irritate the respiratory tract or mucous membranes. Dust or vapor of the compound can irritate or damage the eyes. [1]

References

  1. 1 2 Chemicals and reagents 2008-2010, Merck
  2. ↑ CRC Handbook of Chemistry and Physics, 87th Edition
  3. 1 2 3 4 Peter Werle; Marcus Morawietz; Stefan Lundmark; Kent Sörensen; Esko Karvinen; Juha Lehtonen (2008). "Alcohols, Polyhydric". Ullmann's Encyclopedia of Industrial Chemistry . Weinheim: Wiley-VCH. doi:10.1002/14356007.a01_305.pub2. ISBN   978-3-527-30673-2.
  4. ↑ Haworth, E.; Perkin, W. H. (1894). "Hexamethylene dibromide and its action on sodium and on ethylic sodio-malonate". Journal of the Chemical Society, Transactions. 65: 591–602. doi:10.1039/CT8946500591. ISSN   0368-1645.
  5. ↑ Lazier, W. A.; Hill, J. W.; Amend, W. J. (1939). "Hexamethylene glycol". Org. Synth. 19: 48. doi:10.15227/orgsyn.019.0048.
  6. ↑ Corey, E.J.; Suggs, J.William (1975). "Pyridinium Chlorochromate. An efficient reagent for oxidation of primary and secondary alcohols to carbonyl compounds". Tetrahedron Letters. 16 (31): 2647–2650. doi:10.1016/s0040-4039(00)75204-x.
  7. 1 2 BASF intermediates, BASF
  8. ↑ Kroschwald, Sonja; Maharana, Shovamayee; Simon, Alberti (2017-05-22). "Hexanediol: a chemical probe to investigate the material properties of membrane-less compartments". Matters. doi: 10.19185/matters.201702000010 (inactive 16 July 2025). ISSN   2297-8240.{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)
  9. ↑ Kato, Masato; McKnight, Steven L. (2018-06-20). "A Solid-State Conceptualization of Information Transfer from Gene to Message to Protein". Annual Review of Biochemistry. 87: 351–390. doi:10.1146/annurev-biochem-061516-044700. ISSN   1545-4509. PMID   29195049. S2CID   28314614.
  10. ↑ Franco, Hector L.; Nagari, Anusha; Kraus, W. Lee (2015-04-02). "TNFα signaling exposes latent estrogen receptor binding sites to alter the breast cancer cell transcriptome". Molecular Cell. 58 (1): 21–34. doi:10.1016/j.molcel.2015.02.001. ISSN   1097-4164. PMC   4385449 . PMID   25752574.
  11. ↑ Solutions, Navux Commerce. "1,6 Hexanediol (Cas 629-11-8) - Bulk Specialty Chemical Supplier & distributor". www.parchem.com. Retrieved 2024-06-27.
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