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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:
30 October 2017 to 06 December 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
Lot number: 2000850599
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
20 °C
Vapour pressure:
0 mm Hg
Key result
Test no.:
#3
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#4
Temp.:
25 °C
Vapour pressure:
0 mm Hg

A representative weight loss curve of the test item is shown inFigure 7. The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°Cand 25°Care given inTable 2andTable 3.

The vapour pressure regression curve of the log PTof the test item as function of the reciprocal temperatures is shown inFigure 8. The equation of the curve was:
log PT= -7570´1/T + 20.5 (r = 0.9994, n = 8).

Conclusions:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Tri-o-tolylphosphine.
The vapour pressure of the test item at 20°C (293K) was 5.0E-6 Pa and 3.7E-8 mmHg and at 25°C (298K) was 1.3E-5 Pa and 1.0E-7 mmHg.

Description of key information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Tri-o-tolylphosphine.

The vapour pressure of the test item at 20°C (293K) was 5.0E-6 Pa and 3.7E-8 mmHg and at 25°C (298K) was 1.3E-5 Pa and 1.0E-7 mmHg.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information