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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study following EC Physico/Chemical Test A4, Vapour Pressure (Static Method)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report date:
2013

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
static method

Test material

Constituent 1
Chemical structure
Reference substance name:
Diisobutyl maleate
EC Number:
238-102-4
EC Name:
Diisobutyl maleate
Cas Number:
14234-82-3
Molecular formula:
C12H20O4
IUPAC Name:
1,4-bis(2-methylpropyl) (2Z)-but-2-enedioate
Test material form:
other: liquid
Details on test material:
- Name of test material (as cited in study report): Diisobutyl Maleate
- Physical state: Liquid
- Lot/batch No.: 1303217761

Results and discussion

Vapour pressure
Temp.:
20 °C
Vapour pressure:
5.5 Pa
Remarks on result:
other: mean of runs 1 & 2

Any other information on results incl. tables

 Temp / °C  Temp / K  P / mbar  **P / Pa
          Run 1
*20   293.15  0.05  5
 19.6  292.75  0.0471  4.71
 23.9  297.05  0.1037  10.37
26.7   299.85  0.1833  18.33
 28.7  301.85  0.2355  23.55
 30.5  303.65  0.3689  36.89
 34.9  308.05  0.6985  69.85
          Run 2
 *20  293.15 0.06   6
 19.6  292.75  0.0489  4.89
 23.9  297.05  0.1142  11.42
 25.8  298.95  0.1757  17.57
 29.0 302.15   0.3055  30.55
 31.2  304.35  0.3941  39.41
 35.0 308.15   0.7012  70.12

* - Determined by interpolation ** - Calculated

Comment

Sample degassed over a period of 7 hours.

Run 1: Points 39.8°C, 1.2 mbar and 48.0°C, 1.4 mbar when included in the data set, create a bending in the curve. Bending in the curve may indicate a change in sample phase. Therefore these points must not be included when calculating the vapour pressure and are excluded from the table above.

Applicant's summary and conclusion

Conclusions:
Result : 5.5 Pa at 20°C (mean of runs 1 & 2)
Executive summary:

Result : 5.5 Pa at 20°C (mean of runs 1 & 2)