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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
05 October to 31 October 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Principles of method if other than guideline:
No
GLP compliance:
yes (incl. QA statement)
Type of method:
static method
Key result
Temp.:
20 °C
Vapour pressure:
ca. 11.73 mBar
Remarks on result:
other: mean of runs 1 & 2

Test Results for Ethyl 2-methylbutyrate:

- Date: 26/10/2011 - 31/10/2011

- Operator: C. Ayling / G. Jordan

- Preparation: Sample tested as received.

- SOP Reference: CTL SOP No. 404B

- Apparatus: Static Method Apparatus; Temperature, Balance, Pressure Monitors

 

Result: 11.73 mbar at 20°C (mean of runs 1 & 2)

                                      

Full test results:

Temp/°C     Temp/K      P/mbar      **P / Pa

                               Run 1

   *20           293.15       11.59            1159

   20.7         293.85        11.6             1160

   25.3         298.45        15.5             1550

   33.1         306.25        25.6             2560

   45.5         318.65        48.0             4800

   61.2         334.35        92.5             9250

                               Run 2

    *20          293.15        11.86           1186

    20.6        293.75        12.0             1200

    29.1        302.25        19.3             1930

    38.8        311.95         33.2            3320

    48.1        321.25         50.1            5010

    75.4        348.55        158.6           15860

 

* Determined by extrapolation

** Calculated

Conclusions:
Vapour pressure of ethyl 2 methyl butyrate is 11.73 mbar at 20°C

Description of key information

Vapour pressure has been determined to be 1173 Pa at 20°C

Key value for chemical safety assessment

Vapour pressure:
1 173 Pa
at the temperature of:
20 °C

Additional information

Result: 11.73 mbar at 20°C (mean of runs 1 & 2)