Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25 Feb - 07 Mar 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report Date:
2014

Materials and methods

Test guidelineopen allclose all
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

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
<= 0 Pa
Temp.:
25 °C
Vapour pressure:
<= 0 Pa

Any other information on results incl. tables

The equation of the curve was: log PT = -5746 * 1/T + 14.89 (r = 0.995, n = 8).

 

The results of the isothermal TGA analysis for the test substance and the vapour pressure at 20 °C and 25 °C are given in the following tables.

 

Results of the isothermal TGA analysis

Temperature

[°C]

Weight loss

[μg/min]

νT

[g/cm²/h]

log νT

log PT

PT

[Pa]

130

3.224

3.85E-4

-3.41

0.70

5.0

130

2.527

3.02E-4

-3.52

0.58

3.8

140

6.007

7.17E-4

-3.14

1.01

10

140

5.379

6.42E-4

-3.19

0.96

9.0

150

11.31

1.35E-3

-2.87

1.32

21

150

10.50

1.25E-3

-2.90

1.29

19

160

21.06

2.51E-3

-2.60

1.63

43

160

20.71

2.47E-3

-2.61

1.63

42

 

Vapour pressure of the test substance

Temperature

[°C]

log PT

PT

[Pa]

PT

[mm Hg]

20

-4.71

2.0E-5

1.5E-7

25

-4.38

4.2E-5

3.1E-7

 

 

Conclusion

The vapour pressure values of the test substance at 20 °C (293K) and 25 °C (298K) were ≤ 2.0E-5 Pa and ≤ 4.2E-5 Pa, respectively. The weight losses were obtained with a temperature program of above the melting temperature of the test substance and are therefore reported as ≤ values.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the substance was determined to be ≤ 2.0E-5 Pa and ≤ 4.2E-5 Pa at 20 °C and 25 °C, respectively.