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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
Not reported
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Cited as Directive 92/69/EEC, A.4
GLP compliance:
not specified
Type of method:
effusion method: Knudsen cell
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Temp.:
30 °C
Vapour pressure:
0 Pa

Vapour pressure:

6.3x10-5 Pa at 20°C

1.4x10 -4Pa at 25°C

3.1x10 -4Pa at 30°C

Conclusions:
The results of the three series, obtained at different times and on different samples, show very good reproducibility.
6.3x10-5 Pa at 20°C
1.4x10 -4Pa at 25°C
3.1x10 -4Pa at 30°C
Executive summary:

Vapour pressure:

6.3x10-5Pa at 20°C

1.4x10-4Pa at 25°C

3.1x10-4Pa at 30°C

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 August 1998 to 19 November 1998
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Cited as Directive 92/69/EEC, A.4
GLP compliance:
yes
Type of method:
gas saturation method
Specific details on test material used for the study:
Due to the low vapour pressure of the test substance the tests using the gas saturation method had to be performed at 60, 70 and 80 °C.
The vapour pressure of BIT at 25°C was extrapolated by linear regression.
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Calculated by notifier

Based on the experimental results the vapour pressure curve in In P versus 1/T was plotted. The vapour pressure of ACTICIDE BIT at 25°C was extrapolated by linear regression and determined to be 3.7 10-4Pa at 25°C.

 

Vapour Pressure= 1.8 x 10-4Pa at 20°C was calculated by notifier


Conclusions:
Based on the experimental results the vapour pressure curve in In P versus 1/T was plotted. The vapour pressure of ACTICIDE BIT was extrapolated by linear regression and determined to be 3.7 x 10-4 Pa at 25°C and 1.8 x 10-4 Pa at 20°C
Executive summary:

Vapour pressure: 3.7 x 10-4 Pa at 25°C

Vapour Pressure: 1.8 x 10-4 Pa at 20°C

Description of key information

The vapour pressure was determined according to EU Method A.4 (Macnab, 2000 and Tognucci, 1998).

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure was determined in two studies. The mean result was determined to be 2.55x10-4 Pa at 25°C.