Chemistry:Heptyl isocyanate

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Heptyl isocyanate
Heptyl isocyanate
Names
IUPAC name
1-isocyanatoheptane
Other names
  • n-Heptyl isocyanate
  • Heptylmonoisocyanate
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
EC Number
  • 625-979-7
Properties
C8H15NO
Molar mass 141.214 g·mol−1
Appearance liquid
Density 0.876 g/mL at 25 °C
Boiling point 75 °C (167 °F; 348 K)
Hazards
GHS pictograms GHS05: CorrosiveGHS07: HarmfulGHS08: Health hazard
GHS Signal word Danger
HH302Script error: No such module "Preview warning".Category:GHS errors, HH312Script error: No such module "Preview warning".Category:GHS errors, HH332Script error: No such module "Preview warning".Category:GHS errors, HH315Script error: No such module "Preview warning".Category:GHS errors, HH317Script error: No such module "Preview warning".Category:GHS errors, HH318Script error: No such module "Preview warning".Category:GHS errors, HH334Script error: No such module "Preview warning".Category:GHS errors, HH335Script error: No such module "Preview warning".Category:GHS errors
PP261Script error: No such module "Preview warning".Category:GHS errors, PP264Script error: No such module "Preview warning".Category:GHS errors, PP280Script error: No such module "Preview warning".Category:GHS errors, PP301Script error: No such module "Preview warning".Category:GHS errors, PP312Script error: No such module "Preview warning".Category:GHS errors, PP302Script error: No such module "Preview warning".Category:GHS errors, PP352Script error: No such module "Preview warning".Category:GHS errors, PP305Script error: No such module "Preview warning".Category:GHS errors, PP351Script error: No such module "Preview warning".Category:GHS errors, PP338Script error: No such module "Preview warning".Category:GHS errors
Flash point 63 °C (145 °F; 336 K)
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
Tracking categories (test):

Heptyl isocyanate is an organic chemical compound of carbon, hydrogen, nitrogen, and oxygen with the linear formula CH
3
(CH
2
)
6
NCO
.[2][3] The compound is classified as an aliphatic isocyanate, characterized by the presence of the reactive isocyanate functional group (–N=C=O) attached to a heptyl chain.

Structure

Heptyl isocyanate consists of a seven-carbon alkyl chain (heptyl group) bonded to an isocyanate group. The isocyanate group contains a cumulative double bond between nitrogen and carbon, which contributes to the compound's high reactivity.[4]

When the isocyanate group is attached to the second carbon of the heptyl chain, the resulting positional isomer is referred to as 2-heptyl isocyanate.[5]

Physical properties

The compound is a liquid.

Uses

The compound is primarily used as an intermediate in organic chemistry. Its applications include:[6]

  • Polymer chemistry: As a monofunctional isocyanate, it is used as a chain terminator or modifying agent in the production of polyurethanes to control molecular weight and introduce specific end-group functionalities.[7]
  • Pharmaceutical synthesis: It is employed as a building block or derivatizing agent in the synthesis of certain pharmaceutical compounds, particularly in the formation of carbamate-based drugs or prodrugs.[8]
  • Agrochemicals: the compound serves as a precursor in the synthesis of pesticides and herbicides, where the urea or carbamate functional groups are common components.

References

  1. ↑ "Heptyl isocyanate". Sigma Aldrich. https://www.sigmaaldrich.com/RU/en/product/aldrich/389943?srsltid=AfmBOopogVV_wWmU8_P15hyDViqBtuYpdF3Rtnw0gzQR2VLigIwFhsvg. 
  2. ↑ "Heptyl Isocyanate". TCI Chemicals. https://www.tcichemicals.com/OP/en/p/I0505. 
  3. ↑ "Heptyl isocyanate | CAS 4747-81-3 | SCBT - Santa Cruz Biotechnology" (in en). scbt.com. https://www.scbt.com/p/heptyl-isocyanate-4747-81-3?srsltid=AfmBOorvwHWDgZG8f6T_Vt71IdPgfG9sjBuUSQ2qFWXaRdJd7_RCxXah. 
  4. ↑ "n-Heptyl isocyanate" (in en). NIST. https://webbook.nist.gov/cgi/inchi?ID=C4747813&Mask=80. 
  5. ↑ "(S)-(+)-2-Heptyl isocyanate" (in en). pubchem.ncbi.nlm.nih.gov. https://pubchem.ncbi.nlm.nih.gov/compound/S_-_-2-Heptyl-isocyanate. 
  6. ↑ "Buy n-Heptyl isocyanate | 4747-81-3" (in en). smolecule.com. https://www.smolecule.com/products/s1893004. 
  7. ↑ Teraoka, Iwao (14 February 2019) (in en). Statistical Thermodynamics: Basics and Applications to Chemical Systems. John Wiley & Sons. ISBN 978-1-119-37528-9. https://books.google.com/books?id=XUGIDwAAQBAJ&dq=Heptyl+isocyanate&pg=PT306. Retrieved 25 April 2026. 
  8. ↑ Crouzel, C.; Hinnen, F.; Maitre, E. (1 March 1995). "Radiosynthesis of methyl and heptyl [11CIsocyanates from [11C]phosgene, application to the synthesis of carbamates: [11C]physostygmine and [11C]heptylphysostigmine"]. Applied Radiation and Isotopes 46 (3): 167–170. doi:10.1016/0969-8043(94)00126-K. ISSN 0969-8043. https://www.sciencedirect.com/science/article/abs/pii/096980439400126K. Retrieved 25 April 2026.