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CAS Number: 1609-86-5
Sum Formula: C5H9NO
Molar Mass: 99.1 g/mol
German Synonyms: tert-Butylisocyanat | Isocyansäure-tert.-butylester | 2-Isocyanato-2-methylpropan
English Synonyms: 2-Isocyanato-2-methylpropane
EC Number: 216-544-9
Structural Formula 2-Isocyanato-2-methylpropane

Disclaimer: The CLP/GHS classification is not regularly updated in Chemsafe. For up-to-date information, please use the ECHA database. ( https://echa.europa.eu/en/information-on-chemicals )

GHS Hazard and Category:
  • Flam. Liq. 2: flammable liquids, category 2
GHS Pictogram:
pictogram flammable





GHS Signal Word: Danger
GHS Hazard Statement:
  • H225: Highly flammable liquid and vapour.

Boiling point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa 85 °C UTI: 4801-3144-36568/0-39
UTI: 4801-3144-36568/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 85 °C 1013.25 hPa
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Density
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa 20 °C 0.87 g/cm3 UTI: 4801-3144-36569/0-39
UTI: 4801-3144-36569/0-39;
Line no Density Temperature Pressure
  • defined value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • property of pure substance
1 0.87 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Relative gas density
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 3.42 UTI: 4801-3144-36570/0-39
UTI: 4801-3144-36570/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 3.42
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
  • The oxidizing agent is air with an oxygen content of 20.95 % by volume. In the data base it is usually not specified as mixture component. Exceptions are highlighted.
  • Pressure values are absolute, not gauge pressures.
  • Impurities can strongly influence characteristic safety data, particulary if the properties of the impurity considerably deviate from the respective properties of the pure substance.
  • Safety characteristics are only displayed if evaluated data are available.
  • Values can be cited by using the UTI number of the table (Uniform Table Identifier).
  • Color Codes:         recommended value             no recommendation               do not use value

Flash point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) -6 °C UTI: 4801-3144-36571/0-39
UTI: 4801-3144-36571/0-39;
Line no Flash point
  • best available value
  • closed cup
  • property of pure substance
1 -6 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Stoichiometric fraction of combustible substance in mixture with air
1 2005 Physikalisch-Technische Bundesanstalt (PTB) 3.0 Mol% UTI: 220-3144-36566/0-39
UTI: 220-3144-36566/0-39;
Line no Stoichiometric fraction of combustible substance in mixture with air
  • recommended value
  • property of pure substance
1 3.0 Mol%
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2005
Title Berechnete molare stöchiometrische Brenngasanteile in Luft (c_stoech)
Database PTB
Publisher Datenbank PTB-Lab. 3.43
Language GERM

No entry in database