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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:
from 10 April 2018 to 20 June 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
other: for detailed info on composition
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
1996
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Temp.:
20 °C
Vapour pressure:
0 Pa

Table: Results of the isothermal TGA analysis (test item)

Temperature
[°C]

Weight loss
[µg/min]

νT
[g/cm^2/h]

log νT

log PT

PT
[Pa]

140

2.50873

2.99E-4

-3.52

0.63

4.2

 

2.43631

2.91E-4

-3.54

0.61

4.1

150

4.88613

5.83E-4

-3.23

1.00

9.9

 

5.27474

6.30E-4

-3.20

1.04

11

160

10.0272

1.20E-3

-2.92

1.40

25

 

10.0367

1.20E-3

-2.92

1.40

25

170

18.8507

2.25E-3

-2.65

1.75

56

 

17.1896

2.05E-3

-2.69

1.70

50

Conclusions:
The vapour pressure of the substance at 20°C and 25°C was determined to be 8.5E-7 Pa and 2.1E-6 Pa, resp.
Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study based on EC A.4, OECD 104 and OPPTS 830.7950. Validation of the method was performed using a set of five reference substances. The vapour pressure regression curve (log PT as function of 1/T; with T in K) of the substance was constructed from weight losses measured at 140°C, 150°C, 160°C and 170°C. The vapour pressure of the substance at 20°C and 25°C was calculated (extrapolation) of the vapour pressure curve to be 8.5E-7 Pa and 2.1E-6 Pa, resp.

Description of key information

Vapour pressure at 25°C: 2.1E-6 Pa (EC A.4, OECD 104, OPPTS 830.7950: isothermal thermogravimetric effusion)

Key value for chemical safety assessment

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

Additional information

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