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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:
May 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
August 24, 2009
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
March 23, 2006
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
August 1996
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Temp.:
100 °C
Vapour pressure:
0.26 Pa
Temp.:
100 °C
Vapour pressure:
0.25 Pa
Temp.:
110 °C
Vapour pressure:
1.2 Pa
Temp.:
110 °C
Vapour pressure:
1.3 Pa
Temp.:
120 °C
Vapour pressure:
3.3 Pa
Temp.:
120 °C
Vapour pressure:
4.9 Pa
Temp.:
130 °C
Vapour pressure:
13 Pa
Temp.:
130 °C
Vapour pressure:
12 Pa

A representative weight loss curve of the test item is shown in the attached figure (WeightLoss_VP). At the beginning of the test (i.e. the first 10 min) the test-item suspension in hexane was dried at 30°C. The observed weight increase after 10 min was considered an artefact most probably caused by the pressure change in the measurement chamber when quickly heating from 30 to 100°C.

The equation of the curve was: log PT= -8419´1/T + 22.01 (r = 0.995, n = 8). The regression coefficient was > 0.99 which underlined that the measurement artefact after 10 min did not affect the determination of the vapor pressure of the test item.

Conclusions:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of CH02906.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was 2.0 * 10-7 Pa and 5.9 * 10^7 Pa, respectively.

Description of key information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of CH02906.

Determination according to OECD 104 Guideline.

Key value for chemical safety assessment

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

Additional information