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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:
25 July 2016 to 26 August 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
European Community (EC), EC no. 761/2009, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.4: “Vapour Pressure", Official Journal of the European Union no. L220, August 24, 2009.
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no.104: "Vapour Pressure", March 23, 2006.
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7950: "Vapour pressure", August 1996.
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
No further details specified in the study report.
Key result
Temp.:
20 °C
Vapour pressure:
<= 0 Pa
Key result
Temp.:
20 °C
Vapour pressure:
<= 0 mm Hg
Key result
Temp.:
25 °C
Vapour pressure:
<= 0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
<= 0 mm Hg

Results of the isothermal TGA analysis

Temperature [°C]

Weight loss [μg/min]

vT

[g/cm2/h]

LogvT

Log PT

PT

[Pa]

130

4.579

4.901

5.47 x 10-4

5.85 x 10-4

-3.26

-3.23

0.83

0.86

6.7

7.3

140

9.717

10.49

1.16 x 10-3

1.25 x 10-3

-2.94

-2.90

1.20

1.24

16

17

150

21.89

24.45

2.61 x 10-3

2.92 x 10-3

-2.58

-2.53

1.60

1.66

40

46

160

48.87

54.14

5.83 x 10-3

6.46 x 10-3

-2.23

-2.19

2.00

2.05

1.0 x 102

1.1 x 102

 

Vapour pressure of the test item

Temperature

[°C]

Log PT

PT

[Pa]

PT

[mm Hg]

20

25

-5.60

-5.21

2.5 x 10-6

6.2 x 10-6

1.9 x 10-8

4.7 x 10-8

 

Conclusions:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Lowinox® 22IB46.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C 25°C
[Pa] [mm Hg] [Pa] [mm Hg]
Test item ≤ 2.5 x 10-6 ≤ 1.9 x 10-8 ≤ 6.2 x 10-6 ≤ 4.7 x 10-8
The weight losses of the test item were obtained with a temperature program partly above the melting temperature of a small fraction of the test item. According to this, the vapour pressure of the test item (which was, according to the method, extrapolated to 20°C and 25°C) could be slightly overestimated.
Executive summary:

The purpose of the study was to determine the physico-chemical properties for Lowinox® 22IB46.

 

The vapour pressure of the test item (PT) was determined by the isothermal thermogravimetric effusion method, in accordance with the following guidelines:

European Community (EC), EC no. 761/2009, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.4: “Vapour Pressure", Official Journal of the European Union no. L220, August 24, 2009.

Organization for Economic Co-operation and Development (OECD), OECD Guidelines for the Testing of Chemicals no.104: "Vapour Pressure", March 23, 2006.

United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7950: "Vapour pressure", August 1996.

 

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Lowinox® 22IB46.

The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:

20°C                                     25°C

[Pa]                      [mm Hg]               [Pa]                       [mm Hg]

Test item        ≤ 2.5 x 10-6         ≤ 1.9 x 10-8          ≤ 6.2 x 10-6          ≤ 4.7 x 10-8

The weight losses of the test item were obtained with a temperature program partly above the melting temperature of a small fraction of the test item. According to this, the vapour pressure of the test item (which was, according to the method, extrapolated to 20°C and 25°C) could be slightly overestimated.

Description of key information

Key value determined in a GLP accredited laboratory stucy by the isothermal thermogravimetric effusion method, in accordance with EU Method A.4, OECD Guideline 104 and US EPA Procedure OPPTS 830.7950.

Key value for chemical safety assessment

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

Additional information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Lowinox® 22IB46.

The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:

20°C                                                  25°C

[Pa]                      [mm Hg]               [Pa]                       [mm Hg]

Test item        ≤ 2.5 x 10-6         ≤ 1.9 x 10-8          ≤ 6.2 x 10-6          ≤ 4.7 x 10-8

The weight losses of the test item were obtained with a temperature program partly above the melting temperature of a small fraction of the test item. According to this, the vapour pressure of the test item (which was, according to the method, extrapolated to 20°C and 25°C) could be slightly overestimated.

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