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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
01 - 08 March 2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
July 27, 1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
December 1992
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
gas saturation method
Specific details on test material used for the study:
- Batch n°: 00467090 (charge 05C0836)
- Expiration date: 04 May 2006
- Purity: 99.9%
- Storage condition of test material: at room temperature at about 20°C
Key result
Temp.:
25 °C
Vapour pressure:
0.047 Pa
Remarks on result:
other: Experimentally determined.
Temp.:
35 °C
Vapour pressure:
0.17 Pa
Remarks on result:
other: Experimentally determined.
Temp.:
45 °C
Vapour pressure:
0.45 Pa
Remarks on result:
other: Experimentally determined.
Key result
Temp.:
25 °C
Vapour pressure:
0.048 Pa
Remarks on result:
other: Extrapolation based on the simplified Clausius-Clapeyron equation.

To ensure saturation control, three flow rates were used at each temperature. From the results it could be concluded that higher flow rates did not lead to lower vapour pressures which means that the nitrogen was saturated with test item under the conditions of the test.

The good reproducibility and the high trapping efficiency led to the conclusion that the results of the vapour pressure determination of the test item TIC2782 (T002907) are reliable.

Conclusions:
Extrapolation of the vapour pressure of TIC2782 (T002907) based on the simplified Clausius-Clapeyron equation resulted in a vapour pressure of 4.8E-02 Pa at 25°C. This value is in excellent agreement with the value determined by direct measurements at 25°C, which was 4.7E-02 Pa.

Description of key information

The vapour pressure of T002907 was assessed using the gas saturation method, following the guidelines OECD 104, EU method A.4 (Weissenfeld M, 2006). Extrapolation of the vapour pressure of T002907 based on the simplified Clausius-Clapeyron equation resulted in a vapour pressure of 4.8E-02 Pa at 25°C. This value is in excellent agreement with the value determined by direct measurements at 25°C, which was 4.7E-02 Pa.

Key value for chemical safety assessment

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

Additional information