Chemistry:Butyl isocyanate

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Butyl isocyanate
Skeletal formula of Butyl isocyanate
Names
IUPAC name
1-isocyanatobutane
Other names
  • 1-butyl isocyanate
  • n-butyl isocyanate
  • BIC
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
EC Number
  • 203-862-8
662892
UNII
Properties
C5H9NO
Molar mass 99.133 g·mol−1
Appearance colourless liquid with a pungent odor
Density 0.89 g/cm3
Melting point −75 °C (−103 °F; 198 K)
Boiling point 115 °C (239 °F; 388 K)
decomposes in water
Hazards
GHS pictograms GHS02: FlammableGHS05: CorrosiveGHS06: ToxicGHS08: Health hazard
GHS Signal word Danger
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NFPA 704 (fire diamond)
NFPA 704 four-colored diamondFlammability code 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineHealth code 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasReactivity (yellow): no hazard codeSpecial hazards (white): no code
3
3
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):

Butyl isocyanate is an organic chemical compound of carbon, hydrogen, nitrogen, and oxygen with the linear formula CH
3(CH
2)
3NCO.[2] This is the butyl ester of isocyanic acid.[3]

Synthesis

Butyl isocyanate is usually produced by the reaction between n-butylamine and phosgene.[4][5]

Physical properties

Butyl isocyanate is a highly reactive chemical compound. Like isocyanic acid and other isocyanates, it is highly toxic. Butyl isocyanate polymerizes upon heating.[6]

The compound forms colourless, tear-inducing liquid with a pungent odor.[7]

Chemical properties

Propyl isocyanate decomposes in water, alcohols, and acids. Also decomposes on burning.[8] Butyl isocyanate can be anionically polymerized into poly(butyl isocyanate) when lanthanum isopropoxide is used as the initiator.[3]

Uses

The compound is used in production of other chemicals.

References

  1. ↑ PubChem. "Butyl isocyanate" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/8110. 
  2. ↑ "Butyl isocyanate". TCI Chemicals. https://www.tcichemicals.com/TW/en/p/I0118. 
  3. ↑ 3.0 3.1 "B95736 Butyl isocyanate". Sigma Aldrich. https://www.sigmaaldrich.com/RU/en/product/aldrich/b95736?srsltid=AfmBOop9oswoVMMNReJpneaWpQPwCg4VprsexHF6iOfW4QftCFHty_UE. 
  4. ↑ Ashford, Robert D. (2001). Ashford's dictionary of industrial chemicals (2. ed.). London: Wavelength Publications. p. 189. ISBN 0-9522674-2-X. https://books.google.com/books?id=fk0xAQAAIAAJ. Retrieved 20 January 2026. 
  5. ↑ "Butylisocyanate - Preparation Method". chembk.com. https://www.chembk.com/en/chem/Butylisocyanate. 
  6. ↑ Watts, Henry; Morley, Henry Forster; Muir, Matthew Moncrieff Pattison (1889) (in en). Watts' Dictionary of Chemistry. Longmans, Green. p. 315. https://books.google.com/books?id=v7TigX1XfLMC&dq=Butyl+isocyanate&pg=PA315. Retrieved 20 January 2026. 
  7. ↑ "N-BUTYL ISOCYANATE". NJ.gov. https://www.nj.gov/health/eoh/rtkweb/documents/fs/1332.pdf. 
  8. ↑ "ICSC 1642 - n-BUTYL ISOCYANATE". inchem.org. https://www.inchem.org/documents/icsc/icsc/eics1642.htm. 



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