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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:
25 September 2018 to 26 October 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
2016
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
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
220 Pa
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
340 Pa

The vapour pressure regression curve of the log PT of the test material as function of the reciprocal temperatures was:

log PT = -3191 x 1/T + 13.23 (r = 0.992, n = 8).

Results of the Vapour Pressure Isothermal TGA Analysis

Temperature

[°C]

Weight loss

[µg/min]

vT

[g/cm^2/h]

Log vT

logPT

PT

[Pa]

20

61.9639

7.40 x 10^-3

-2.13

2.36

2.3 x 10^2

57.3405

6.84 x 10^-3

-2.16

2.32

2.1 x 10^2

25

88.0154

1.05 x 10^-2

-1.98

2.55

3.6 x 10^2

81.7638

9.76 x 10^-3

-2.01

2.51

3.3 x 10^2

30

121.648

1.45 x 10^-2

-1.84

2.73

5.4 x 10^2

112.231

1.34 x 10^-2

-1.87

2.69

4.9 x 10^2

35

166.093

1.98 x 10^-2

-1.70

2.90

8.0 x 10^2

146.922

1.75 x 10^-2

-1.76

2.84

6.9 x 10^2

Vapour Pressure of the Test Material

Temperature
[°C]

logPT

PT
[Pa]

PT
[mm Hg]

20

2.35

2.2 x 10^2

1.7

25

2.53

3.4 x 10^2

2.5
Conclusions:
Under the conditions of this study, the vapour pressure of the test material at 20 °C (293 K) was 220 Pa and at 25 °C (298 K) was 340 Pa.
Executive summary:

The vapour pressure of the test material was investigated in accordance with the standardised guidelines OECD 104, EU Method A.4 and OPPTS 830.7950, under GLP conditions, using the isothermal TGA effusion method.

Under the conditions of this study, the vapour pressure of the test material at 20 °C (293 K) was 220 Pa and at 25 °C (298 K) was 340 Pa.

Description of key information

Under the conditions of this study, the vapour pressure of the test material at 20 °C (293 K) was 220 Pa and at 25 °C (298 K) was 340 Pa.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test material was investigated in accordance with the standardised guidelines OECD 104, EU Method A.4 and OPPTS 830.7950, under GLP conditions, using the isothermal TGA effusion method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of this study, the vapour pressure of the test material at 20 °C (293 K) was 220 Pa and at 25 °C (298 K) was 340 Pa.