Phenyl isocyanate

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Structural formula
Structural formula of phenyl isocyanate
General
Surname Phenyl isocyanate
other names
  • Phenyl carbimide
  • Isocyanatobenzene
  • Isocyanic acid phenyl ester
  • Phenyl carbonimide
  • PIC
Molecular formula C 7 H 5 NO
Brief description

clear, colorless and tear-irritating liquid

External identifiers / databases
CAS number 103-71-9
EC number 203-137-6
ECHA InfoCard 100,002,852
PubChem 7672
Wikidata Q408413
properties
Molar mass 119.12 g mol −1
Physical state

liquid

density

1.10 g cm −3

Melting point

−31 ° C

boiling point

166 ° C

Vapor pressure

2.63 mbar (20 ° C)

solubility

Decomposes in water

Refractive index

1.535 (20 ° C)

safety instructions
GHS labeling of hazardous substances
02 - Highly / extremely flammable 06 - Toxic or very toxic 05 - Corrosive 08 - Dangerous to health

danger

H and P phrases H: 226-302-314-317-330-334
P: 210-280-301 + 330 + 331-302 + 352-304 + 340-305 + 351 + 338-308 + 310
Toxicological data

800 mg kg −1 ( LD 50 ,  rat ,  oral )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Phenyl isocyanate is a chemical compound from the group of organic isocyanates .

Extraction and presentation

Phenyl isocyanate can be obtained from aniline and phosgene , with more than 1000  t per year being manufactured or imported.

properties

Phenyl isocyanate is a tear-irritating, inflammable, colorless to yellowish liquid with a pungent odor. In water , it hydrolyzes to aniline with carbon dioxide being split off. The heat of decomposition determined by DSC is −49 kJ · mol −1 or −410 kJ · kg −1 .

use

Phenyl isocyanate is used as a reagent for amines and alcohols, for the production of pharmaceuticals, pesticides (e.g. carbetamide ), textile auxiliaries (optical brighteners), plasticizers and in the paint and photo industry.

safety instructions

The vapors of phenyl isocyanate can form an explosive mixture with air ( flash point 51 ° C, ignition temperature 580 ° C).

Individual evidence

  1. ↑ Entry on phenyl isocyanate. In: Römpp Online . Georg Thieme Verlag, accessed on June 16, 2014.
  2. ↑ a b c d e f g h i j Entry on phenyl isocyanate in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
  3. ↑ Phenyl isocyanate data sheet from Sigma-Aldrich , accessed on May 14, 2017 ( PDF ).
  4. ↑ a b Toxicological assessment of phenyl isocyanate (PDF) at the professional association raw materials and chemical industry (BG RCI), accessed on August 22, 2012.
  5. ↑ T. Grewer, O. Klais: Exothermic decomposition - investigations of the characteristic material properties. (= Humanization of working life. Volume 84). VDI-Verlag, Düsseldorf 1988, ISBN 3-18-400855-X , p. 9.