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Diss Factsheets

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 28 March 2018 to 01 May 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guidelineopen allclose all
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

Test material

Constituent 1
Reference substance name:
Plum, ext.
EC Number:
290-179-3
EC Name:
Plum, ext.
Cas Number:
90082-87-4
Molecular formula:
not applicable
IUPAC Name:
Extract obtained from fruits of Prunus domestica L. Rosaceae
Test material form:
liquid
Details on test material:
- Physical appearance: Blackish brown to dark brown liquid
- Storage conditions: At room temperature

Results and discussion

Vapour pressureopen allclose all
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
< 7.6 Pa
Remarks on result:
other: for volatile part of the test item
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
< 12 Pa
Remarks on result:
other: for volatile part of the test item
Key result
Test no.:
#2
Temp.:
20 °C
Vapour pressure:
< 0.002 Pa
Remarks on result:
other: for non-volatile part of the test item
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
< 0.004 Pa
Remarks on result:
other: for non-volatile part of the test item

Any other information on results incl. tables

Table: Results of the isothermal TGA analysis

Temperature
[°C]

Weight loss
[µg/min]

νT
[g/cm2/h]

log νT

log PT

PT
[Pa]

40

45.7608

5.46 E-3

-2.26

2.24

1.7 E2

 

45.4822

5.43 E-3

-2.27

2.24

1.7 E2

50

32.5938

3.89 E-3

-2.41

2.05

1.1 E2

 

34.1470

4.08 E-3

-2.39

2.08

1.2 E2

60

24.4739

2.92 E-3

-2.53

1.89

78

 

26.2126

3.13 E-3

-2.50

1.93

85

70

21.4039

2.55 E-3

-2.59

1.82

66

 

21.2349

2.53 E-3

-2.60

1.81

65

 

Temperature
[°C]

Weight loss
[µg/min]

νT
[g/cm2/h]

log νT

log PT

PT [Pa]

100

11.6744

1.39 E-3

-2.86

1.48

30

 

13.2020

1.58 E-3

-2.80

1.55

35

110

15.1130

1.80 E-3

-2.74

1.62

42

 

14.9663

1.79 E-3

-2.75

1.62

42

120

11.0544

1.32 E-3

-2.88

1.45

28

 

12.9018

1.54 E-3

-2.81

1.54

34

130

13.4779

1.61 E-3

-2.79

1.56

36

 

13.5359

1.62 E-3

-2.79

1.56

37

Weight loss was observed from the start of the study due to evaporation of volatile components. In the range of 40°C and 70°C, no increasing weight loss was observed and the results within this range were therefore not reliable for the determination of the vapour pressure. The weight losses were compared with the results for reference naphthalene. Since the weight loss of the test item at 40°C-70°C was lower than the weight loss of naphthalene at the same temperatures, it was considered that vapour pressure of the substance (volatile part) at 20°C (25°C) is lower than the vapour pressure of naphthalene at 20°C (25°C).

The log PT versus 1/T curve for the substance over the range 100 -130°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation to 20°C or 25°C would not give reliable results for the vapour pressure of the substance at these temperatures. Since the weight loss of the test item at 110°C-130°C was lower than the weight loss of reference substance hexachlorobenzene at the same temperatures, it was considered that vapour pressure of the substance (non-volatile part) at 20°C (25°C) is lower than the vapour pressure of hexachlorobenzene at 20°C (25°C).

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the substance (volatile part) at 20°C was determined to be < 7.6 Pa.
The vapour pressure of the substance (non-volatile part) at 20°C was determined to be < 1.5E-3 Pa.

Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950.

The constants specific for the experimental arrangement were determined using a set of 5 reference compounds. The log PT versus 1/T curve for the substance showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results for the vapour pressure of the substance.

From the measured weight losses in the temperature range 40 -70°C, the vapour pressure of the (volatile part of the) substance was determined to be lower than the vapour pressure of reference substance naphthalene.

From the measured weight losses in the temperature range 100 -130°C, the vapour pressure of the (non-volatile part of the) substance was determined to be lower than the vapour pressure of reference substance hexachlorobenzene.

From 150°C upwards, reaction and/or decomposition was observed.

The vapour pressure of the substance (volatile part) at 20°C was determined to be < 7.6 Pa.

The vapour pressure of the substance (non-volatile part) at 20°C was determined to be < 1.5E-3 Pa.