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CAS Number: 97-85-8
Sum Formula: C8H16O2
Molar Mass: 144.2 g/mol
German Synonyms: i-Butylisobutyrat | Isobutylisobutyrat | Isobuttersäureisobutylester | 2-Methylpropansäure-2-methylpropylester
English Synonyms: i-Butyl isobutanoate | Isobutyl isobutanoate | 2-Methylpropanoic acid 2-methylpropyl ester
EC Number: 202-612-5
Temperature Class: T2
Explosion Group: IIA (estimated)
Structural Formula 2-Methylpropanoic acid 2-methylpropyl ester

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. 3: flammable liquids, category 3
GHS Pictogram:
pictogram flammable





GHS Signal Word: Warning
GHS Hazard Statement:
  • H226: Flammable liquid and vapour.

Antoine parameters
1 1987 Stephenson, R.M.; Malanowski, S. 6.74347 kPa UTI: 137-1913-27237/0-39
UTI: 137-1913-27237/0-39;
Line no Upper temperature limit of Antoine equation Lower temperature limit of Antoine equation Antoine constant C Antoine constant B Antoine constant A
  • recommended value
  • saturated
  • property of pure substance
  • recommended value
  • saturated
  • property of pure substance
  • recommended value
  • by regression
  • saturated
  • property of pure substance
  • recommended value
  • by regression
  • saturated
  • property of pure substance
  • defined value
  • by regression
  • saturated
  • property of pure substance
1 < 421 K > 277 K -41.828 K 1794.65 K 6.74347 kPa
Bibliographic data
Author Stephenson, R.M.; Malanowski, S.
Year 1987
Title Handbook of The Thermodynamics of Organic Compounds
Publisher Elsevier; New York, Amsterdam, London
Language ENGL
Boiling point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa 147 °C UTI: 4801-1913-27246/0-39
UTI: 4801-1913-27246/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 147 °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 0.85 g/cm3 UTI: 4801-1913-27247/0-39
UTI: 4801-1913-27247/0-39;
Line no Density Temperature Pressure
  • defined value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • property of pure substance
1 0.85 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
Melting point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) -81 °C UTI: 4801-1913-27245/0-39
UTI: 4801-1913-27245/0-39;
Line no Melting temperature
  • defined value
  • experimental
  • at atmospheric pressure
  • property of pure substance
1 -81 °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
Solubility in water
1 2009 Physikalisch-Technische Bundesanstalt (PTB) 25 °C 0.57 g/l UTI: 228-1913-27242/0-39
UTI: 228-1913-27242/0-39;
Line no Solubility in water Temperature
  • defined value
  • property of pure substance
  • property of pure substance
1 0.57 g/l 25 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2009
Title Wasserlöslichkeit
Database PTB
Publisher Datenbank PTB-Lab. 3.43
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

Autoignition Temperature
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 432 °C UTI: 4801-1913-27249/0-39
UTI: 4801-1913-27249/0-39;
Line no Autoignition Temperature
  • recommended value
  • experimental
  • international standard method
  • property of pure substance
1 432 °C [A]
[A] IEC 79-4: Method of Test for Ignition Temperature, Electrical Apparatus for Explosive G; Replaced by IEC-60079-20-1 in 1975
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
Flash point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 37 °C UTI: 4801-1913-27248/0-39
UTI: 4801-1913-27248/0-39;
Line no Flash point
  • recommended value
  • experimental
  • closed cup
  • property of pure substance
1 37 °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
Maximum experimental safe gap
1 2020 DIN EN ISO/IEC 1 mm UTI: 241-1913-27243/0-39
UTI: 241-1913-27243/0-39;
Line no Maximum experimental safe gap
  • recommended value
  • property of pure substance
1 1 mm
Bibliographic data
Author DIN EN ISO/IEC
Year 2020
Title DIN EN ISO/IEC 80079-20-1 :2020-09
Subtitle Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data
Publisher Beuth
Publisher City Berlin
Stoichiometric fraction of combustible substance in mixture with air
1 2005 Physikalisch-Technische Bundesanstalt (PTB) 1.9 Mol% UTI: 220-1913-27241/0-39
UTI: 220-1913-27241/0-39;
Line no Stoichiometric fraction of combustible substance in mixture with air
  • recommended value
  • property of pure substance
1 1.9 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