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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
23. Jan. 2018 to 15. Mar. 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:
OECD Guidelines for the Testing of Chemicals, Method No. 104, adopted 23. Mar. 2006: “Vapour Pressure“
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Commission Regulation (EC) No 761/2009 of 23. July 2009, published on 24. Aug. 2009 Method A.4: “Vapour Pressure”
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
No further details specified in the study report.
Key result
Temp.:
20 °C
Vapour pressure:
0.001 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0.001 Pa

Sample Weights

The mass of sample in the respective cell is presented in the following table:

 

Sample Weights

Parameter

Cell empty

Cell + test item

Cell + test item + cap

Test item

Unit

g

g

g

g

Knudsen-cell 1

2.57193

4.00681

4.21808

1.43488

Knudsen-cell 2

2.55960

3.96862

4.17858

1.40902

Knudsen-cell 3

2.56539

3.85480

4.06788

1.28941

Knudsen-cell 4

2.57348

4.01491

4.22539

1.44143

 

Measurement Data

The data of the evaluated experiments is presented in the following tables:

 

Measurement Data Experiment 1

Experiment

1

 

 

 

Nom. Temperature

30

°C

 

 

Date and time START

 

23.01.2018 14:34

24.01.2018 12:25

25.01.2018 12:28

Date and time END

 

24.01.2018 11:25

25.01.2018 11:20

26.01.2018 11:30*

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.21808

4.21653

4.21624

4.21570

Knudsen-cell 2

4.17858

4.16378

4.16211

4.16038

Knudsen-cell 3

4.06788

4.05642

4.05583

4.05526

Knudsen-cell 4

4.22539

4.21599

4.21588

4.21486

*The samples were stored in a desiccator after the weightings until start of the next measurement series due to organisational reasons.

 

Measurement Data Experiment 2

Experiment

2

 

 

 

Nom. Temperature

45

°C

 

 

Date and time START

 

29.01.2018 11:44

30.01.2018 12:10

31.01.2018 12:23

Date and time END

 

30.01.2018 11:10

31.01.2018 11:30

01.02.2018 11:15

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.21570

4.21479

4.21405

4.21362

Knudsen-cell 2

4.16038

4.15882

4.15755

4.15649

Knudsen-cell 3

4.05526

4.05321

4.05094

4.04981

Knudsen-cell 4

4.21486

4.21339

4.21166

4.21076

 

Measurement Data Experiment 3

Experiment

3

 

 

 

Nom. Temperature

60

°C

 

 

Date and time START

 

01.02.2018 12:10

05.02.2018 11:10

06.02.2018 12:40

Date and time END

 

02.02.2018 10:00*

06.02.2018 11:45

07.02.2018 11:45*

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.21362

4.21140

4.20892

4.20675

Knudsen-cell 2

4.15649

4.15422

4.15260

4.15088

Knudsen-cell 3

4.04981

4.04751

4.04610

4.04425

Knudsen-cell 4

4.21076

4.20773

4.20537

4.20297

*The samples were stored in a desiccator after the weightings until start of the next measurement series due to organisational reasons.

 

Measurement Data Experiment 4

Experiment

4

 

 

 

Nom. Temperature

75

°C

 

 

Date and time START

 

12.02.2018 10:00

13.02.2018 12:35

14.02.2018 12:25

Date and time END

 

13.02.2018 11:25

14.02.2018 11:50

15.02.2018 13:20

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.20675

4.20162

4.19661

4.19166

Knudsen-cell 2

4.15088

4.14720

4.14447

4.14197

Knudsen-cell 3

4.04425

4.04128

4.03850

4.03580

Knudsen-cell 4

4.20297

4.19843

4.19482

4.19119

 

Measurement Data Experiment 5

Experiment

5

 

 

 

Nom. Temperature

90

°C

 

 

Date and time START

 

15.02.2018 14:20

19.02.2018 07:45

20.02.2018 07:50

Date and time END

 

16.02.2018 11:20*

20.20.2018 06:48

21.02.2018 07:10

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.19166

4.18794

4.17863

4.17240

Knudsen-cell 2

4.14197

4.14110

4.13378

4.13042

Knudsen-cell 3

4.03580

4.03540

4.02904

4.02551

Knudsen-cell 4

4.19119

4.18420

4.17163

4.16179

*The samples were stored in a desiccator after the weightings until start of the next measurement series due to organisational reasons.

 

Measurement Data Experiment 6

Experiment

6

 

 

 

Nom. Temperature

105

°C

 

 

Date and time START

 

21.02.2018 08:30

22.02.2018 08:10

26.02.2018 11:30

Date and time END

 

22.02.2018 06:55

23.02.2018 07:00*

27.02.2018 11:45

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.17240

4.15580

4.14267

4.12842

Knudsen-cell 2

4.13042

4.11526

4.09652

4.07900

Knudsen-cell 3

4.02551

4.01225

3.99648

3.98030

Knudsen-cell 4

4.16179

4.14318

4.13090

4.11812

*The samples were stored in a desiccator after the weightings until start of the next measurement series due to organisational reasons.

 

Measurement Data Experiment 7

Experiment

7

 

 

 

Nom. Temperature

120

°C

 

 

Date and time START

 

27.02.2018 12:44

28.02.2018 12:18

01.03.2018 12:22

Date and time END

 

28.02.2018 11:30

01.03.2018 11:25

02.03.2018 10:30*

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.12842

4.10113

4.07798

4.06158

Knudsen-cell 2

4.07900

4.05231

4.03023

4.01440

Knudsen-cell 3

3.98030

3.95607

3.93508

3.91983

Knudsen-cell 4

4.11812

4.09243

4.07000

4.05299

*The samples were stored in a desiccator after the weightings until start of the next measurement series due to organisational reasons.

 

Measurement Data Experiment 8

Experiment

8

 

 

 

Nom. Temperature

135

°C

 

 

Date and time START

 

06.03.2018 11:30

06.03.2018 12:20

07.03.2018 12:40

Date and time END

 

06.03.2018 11:30

07.03.2018 11:50

08.03.2018 11:30*

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

4.06158

3.67684

3.64625

3.62614

Knudsen-cell 2

4.01440

3.97110

3.94127

3.91898

Knudsen-cell 3

3.91983

3.88036

3.85199

3.83161

Knudsen-cell 4

4.05299

4.00999

3.98060

3.95884

*The samples were stored in a desiccator after the weightings until start of the next measurement series due to organisational reasons.

 

Measurement Data Experiment 9

Experiment

9

 

 

 

Nom. Temperature

150

°C

 

 

Date and time START

 

12.03.2018 12:15

13.03.2018 13:55

14.03.2018 13:58

Date and time END

 

13.03.2018 13:00

14.03.2018 13:00

15.03.2018 11:35

Parameter

Weight m

Weight m

Weight m

Weight m

Unit

g

g

g

g

Knudsen-cell 1

3.62614

3.59670

3.58082

3.56879

Knudsen-cell 2

3.91989

3.87730

3.85467

3.83860

Knudsen-cell 3

3.83161

3.79356

3.77254

3.75749

Knudsen-cell 4

3.95884

3.91737

3.89459

3.87900

 

Calculation Results

All calculation results are given in the table below.

In all tables, E-0X represents multiplication with 10-x. Experiment 9 (nominal temperature 150 °C) showed no reproducible weight loss. Therefore they were not used for calculation.

 

Calculation Results Experiment 1

Experiment

1

 

 

 

 

 

 

 

 

Real Temperature in K

303.2

 

 

 

 

 

 

 

 

Real Temperature in °C

30.0

 

 

 

 

 

 

 

 

Date of Measurement

24.01.2018 11:25

25.01.2018 11:20

26.01.2018 11:30

Elapsed Time in s

75000

82500

82920

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.00155

yes

4.63E-03

0.00029

yes

7.88E-04

0.00054

yes

1.46E-03

Knudsen-cell 2

0.01480

yes

4.42E-02

0.00167

yes

4.54E-03

0.00173

yes

4.68E-03

Knudsen-cell 3

0.01146

yes

3.43E-02

0.00059

yes

1.60E-03

0.00057

yes

1.54E-03

Knudsen-cell 4

0.00940

yes

2.81E-02

0.00011

yes

2.99E-04

0.00102

yes

2.76E-03

Mean

 

no

 

 

yes

1.81E-03

 

yes

2.61E-03

Standard deviation:

 

 

 

 

 

1.90E-03

 

 

1.50E-03

Mean of measured values:

2.208E-03

 

 

 

 

 

 

Standard deviation:

5.670E-04

RSD:

25.7%

 

 

 

 

If “no” is stated the respective column: measurement was not considered for the calculation of the mean.

 

Calculation Results Experiment 2

Experiment

2

 

 

 

 

 

 

 

 

Real Temperature in K

318.2

 

 

 

 

 

 

 

 

Real Temperature in °C

45.0

 

 

 

 

 

 

 

 

Date of Measurement

30.01.2018 11:10

31.01.2018 11:30

01.02.2018 11:15

Elapsed Time in s

84360

84000

82320

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.00091

yes

2.48E-03

0.00074

yes

2.02E-03

0.00043

yes

1.20E-03

Knudsen-cell 2

0.00156

yes

4.25E-03

0.00127

yes

3.47E-03

0.00106

yes

2.96E-03

Knudsen-cell 3

0.00250

yes

5.58E-03

0.00227

yes

6.21E-03

0.00113

yes

3.15E-03

Knudsen-cell 4

0.00147

yes

4.00E-03

0.00173

yes

4.73E-03

0.00090

yes

2.51E-03

Mean

 

yes

4.08E-03

 

yes

4.11E-03

 

yes

2.45E-03

Standard deviation:

 

 

1.27E-03

 

 

1.78E-03

 

 

8.79E-04

Mean of measured values:

3.546E-03

 

 

 

 

 

 

Standard deviation:

9.453E-04

RSD:

26.7%

 

 

 

 

 

Calculation Results Experiment 3

Experiment

3

 

 

 

 

 

 

 

 

Real Temperature in K

333.2

 

 

 

 

 

 

 

 

Real Temperature in °C

60.0

 

 

 

 

 

 

 

 

Date of Measurement

02.02.2018 10:00

06.02.2018 11:45

07.02.2018 11:45

Elapsed Time in s

78600

88500

83100

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.00222

yes

6.64E-03

0.00248

yes

6.58E-03

0.00217

yes

6.14E-03

Knudsen-cell 2

0.00227

yes

6.79E-03

0.00162

yes

4.30E-03

0.00172

yes

4.86E-03

Knudsen-cell 3

0.00230

yes

6.88E-03

0.00141

yes

3.74E-03

0.00185

yes

5.23E-03

Knudsen-cell 4

0.00303

yes

9.06E-03

0.00236

yes

6.27E-03

0.00240

yes

6.79E-03

Mean

 

yes

7.34E-03

 

yes

5.22E-03

 

yes

5.75E-03

Standard deviation:

 

 

1.15E-03

 

 

1.41E-03

 

 

8.71E-04

Mean of measured values:

6.106E-03

 

 

 

 

 

 

Standard deviation:

1.101E-03

RSD:

18.0%

 

 

 

 

 

Calculation Results Experiment 4

Experiment

4

 

 

 

 

 

 

 

 

Real Temperature in K

348.2

 

 

 

 

 

 

 

 

Real Temperature in °C

75.0

 

 

 

 

 

 

 

 

Date of Measurement

13.02.2018 11:25

14.02.2018 11:50

15.02.2018 13:20

Elapsed Time in s

91500

83700

89100

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.00513

yes

1.35E-02

0.00501

yes

1.44E-02

0.00495

yes

1.33E-02

Knudsen-cell 2

0.00368

yes

9.66E-03

0.00273

yes

7.83E-03

0.00250

yes

6.74E-03

Knudsen-cell 3

0.00297

yes

7.80E-03

0.00278

yes

7.97E-03

0.00270

yes

7.28E-03

Knudsen-cell 4

0.00454

yes

1.19E-02

0.00361

yes

1.04E-02

0.00363

yes

9.79E-03

Mean

 

yes

1.07E-02

 

yes

1.01E-02

 

yes

9.29E-03

Standard deviation:

 

 

2.49E-03

 

 

3.05E-03

 

 

3.01E-03

Mean of measured values:

1.005E-02

 

 

 

 

 

 

Standard deviation:

7.162E-04

RSD:

7.1%

 

 

 

 

 

Calculation Results Experiment 5

Experiment

5

 

 

 

 

 

 

 

 

Real Temperature in K

363.2

 

 

 

 

 

 

 

 

Real Temperature in °C

90.0

 

 

 

 

 

 

 

 

Date of Measurement

16.02.2018 11:20

20.02.2018 06:48

21.02.2018 07:10

Elapsed Time in s

75600

82980

84000

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.00372

yes

1.21E-02

0.00931

yes

2.75E-02

0.00623

yes

1.82E-02

Knudsen-cell 2

0.00087

no

 

0.00732

yes

2.16E-02

0.00336

yes

9.81E-03

Knudsen-cell 3

0.00040

no

 

0.00636

yes

1.88E-02

0.00353

yes

1.03E-02

Knudsen-cell 4

0.00699

yes

2.27E-02

0.01257

yes

3.72E-02

0.00984

yes

2.87E-02

Mean

 

yes

1.74E-02

 

yes

2.63E-02

 

yes

1.68E-02

Standard deviation:

 

 

7.50E-03

 

 

8.11E-03

 

 

8.86E-03

Mean of measured values:

2.014E-02

 

 

 

 

 

 

Standard deviation:

5.328E-03

RSD:

26.5%

 

 

 

 

If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.

 

Calculation Results Experiment 6

Experiment

6

 

 

 

 

 

 

 

 

Real Temperature in K

378.2

 

 

 

 

 

 

 

 

Real Temperature in °C

105.0

 

 

 

 

 

 

 

 

Date of Measurement

22.02.2018 06:55

23.02.2018 07:00

27.02.2018 11:45

Elapsed Time in s

80700

82200

87300

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.01660

yes

5.15E-02

0.01313

yes

4.00E-02

0.01425

yes

4.09E-02

Knudsen-cell 2

0.01516

yes

4.70E-02

0.01874

yes

5.71E-02

0.01752

yes

5.02E-02

Knudsen-cell 3

0.01326

yes

4.11E-02

0.01577

yes

4.80E-02

0.01618

yes

4.64E-02

Knudsen-cell 4

0.01861

yes

5.77E-02

0.01228

yes

3.74E-02

0.01278

yes

3.66E-02

Mean

 

yes

4.93E-02

 

yes

4.56E-02

 

yes

4.53E-02

Standard deviation:

 

 

7.02E-03

 

 

8.87E-03

 

 

5.99E-03

Mean of measured values:

4.617E-02

 

 

 

 

 

 

Standard deviation:

2.943E-03

RSD:

6.4%

 

 

 

 

 

Calculation Results Experiment 7

Experiment

7

 

 

 

 

 

 

 

 

Real Temperature in K

393.2

 

 

 

 

 

 

 

 

Real Temperature in °C

120.0

 

 

 

 

 

 

 

 

Date of Measurement

28.02.2018 11:30

01.03.2018 11:25

02.03.2018 10:30

Elapsed Time in s

81960

83220

79680

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.02729

yes

8.50E-02

0.02315

yes

7.10E-02

0.01640

yes

5.25E-02

Knudsen-cell 2

0.02669

yes

8.31E-02

0.02208

yes

6.77E-02

0.01583

yes

5.07E-02

Knudsen-cell 3

0.02423

yes

7.55E-02

0.02099

yes

6.44E-02

0.01525

yes

4.89E-02

Knudsen-cell 4

0.02569

yes

8.00E-02

0.02243

yes

6.88E-02

0.01701

yes

5.45E-02

Mean

 

yes

8.09E-02

 

yes

6.80E-02

 

yes

5.17E-02

Standard deviation:

 

 

4.17E-03

 

 

2.76E-03

 

 

2.42E-03

Mean of measured values:

6.684E-02

 

 

 

 

 

 

Standard deviation:

1.466E-02

RSD:

21.9%

 

 

 

 

 

Calculation Results Experiment 8

Experiment

8

 

 

 

 

 

 

 

 

Real Temperature in K

408.2

 

 

 

 

 

 

 

 

Real Temperature in °C

135.0

 

 

 

 

 

 

 

 

Date of Measurement

06.02.2018 11:30

07.03.2018 11:50

08.03.2018 11:30

Elapsed Time in s

86400

84600

82200

Parameter

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Weight loss

To be used

Vapour pressure

Unit

g

yes/no

Pa

g

yes/no

Pa

g

yes/no

Pa

Knudsen-cell 1

0.38474

no

 

0.03059

yes

9.40E-02

0.02011

yes

6.36E-02

Knudsen-cell 2

0.04330

yes

1.30E-01

0.02983

yes

9.17E-02

0.02229

yes

7.05E-02

Knudsen-cell 3

0.03947

yes

1.19E-01

0.02837

yes

8.72E-02

0.02038

yes

6.45E-02

Knudsen-cell 4

0.04300

yes

1.29E-01

0.02939

yes

9.04E-02

0.02176

yes

6.89E-02

Mean

 

yes

1.26E-01

 

yes

9.09E-02

 

no

 

Standard deviation:

 

 

6.41E-03

 

 

2.85E-03

 

 

 

Mean of measured values:

1.085E-01

 

 

 

 

 

 

Standard deviation:

2.501E-02

RSD:

23.0%

 

 

 

 

If “no” is stated in the respective column: measurement was not considered for the calculation of the mean.

 

Evaluation

The measured values for temperature and vapour pressure were evaluated as follows:

Evaluation of Calculated Values

Parameter

T

Mean p

1/T

Log p

Unit

K

Pa

1/K

Log Pa

Values

303.2

2.21E-03

3.2982E-03

-2.6561

318.2

3.55E-03

3.1427E-03

-2.4502

333.2

6.11E-03

3.0012E-03

-2.2142

348.2

1.00E-02

2.8719E-03

-1.9980

363.2

2.01E-02

2.7533E-03

-1.6959

378.2

4.62E-02

2.6441E-03

-1.3356

393.2

6.68E-02

2.5432E-03

-1.1749

408.2

1.09E-01

2.4498E-03

-0.9645

 

RESULTS

 

Test Item

The following vapour pressures were determined experimentally and considered as valid (mean and standard deviation given:

 

Experimentally Determined Vapour Pressures

T

T

p

Stand. Dev. p

RSD p

°C

K

Pa

Pa

%

30.0

303.2

2.21E-03

5.67E-04

25.7%

45.0

318.2

3.55E-03

9.45E-04

26.7%

60.0

333.2

6.11E-03

1.10E-03

18.0%

75.0

348.2

1.00E-02

7.16E-04

7.1%

90.0

363.2

2.01E-02

5.33E-03

25.5%

105.0

378.2

4.62E-02

2.94E-03

6.4%

120.0

393.2

6.68E-02

1.47E-02

21.9%

135.0

408.2

1.09E-01

2.50E-02

23.0%

In this table, E-0X represents multiplication with 10-x

Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation

Conclusions:
For the test item LUMULSE GMT-K, the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:
Vapour pressure at 20 °C: 1.00 * 10-03Pa
Vapour pressure at 25 °C: 1.32 * 10-03Pa
Executive summary:

Determination of the Vapour Pressure of LUMULSE GMT-K according to OECD 104 resp. EU A.4 using the effusion method: Knudsen Cell.

 

Findings and Results:

The vapour pressure of LUMULSE GMT-K was determined according to OECD 104 resp. EU A.4 using the effusion method (weight loss).

Vapour pressure was examined at nine different temperatures. Eight temperatures could be evaluated as they showed reproducible weight loss. For these temperatures, 1/T was plotted against log (p).

 

Vapour Pressures (Effusion Method)

Experiment

T

Mean p

Stand. Dev. p

RSD p

No.

K

Pa

Pa

%

1

303.2

2.21E-03

5.76E-04

25.7%

2

318.2

3.55E-03

9.45E-04

26.7%

3

333.2

3.11E-03

1.10E-03

18.0%

4

348.2

1.00E-02

7.16E-04

7.1%

5

363.2

2.01E-02

5.33E-03

26.5%

6

378.2

4.62E-02

2.94E-03

6.4%

7

393.2

6.68E-02

1.47E-02

21.9%

8

408.2

1.09E-01

2.50E-02

23.0%

In this table, E-0X represents multiplication with 10-x.

Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation

 

The graph 1/T vs. log (p) shows a straight line with a correlation coefficient of - 0.9923.

 

For the test item LUMULSE GMT-K, the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:

Vapour pressure at 20 °C: 1.00 * 10-03Pa

Vapour pressure at 25 °C: 1.32 * 10-03Pa

Description of key information

For the test item LUMULSE GMT-K, the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:

Vapour pressure at 20 °C: 1.00 * 10-03Pa

Vapour pressure at 25 °C: 1.32 * 10-03Pa

Key value for chemical safety assessment

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

Additional information

The vapour pressure of LUMULSE GMT-K was determined according to OECD 104 resp. EU A.4 using the effusion method (weight loss).

Vapour pressure was examined at nine different temperatures. Eight temperatures could be evaluated as they showed reproducible weight loss. For these temperatures, 1/T was plotted against log (p).

 

Vapour Pressures (Effusion Method)

Experiment

T

Mean p

Stand. Dev. p

RSD p

No.

K

Pa

Pa

%

1

303.2

2.21E-03

5.76E-04

25.7%

2

318.2

3.55E-03

9.45E-04

26.7%

3

333.2

3.11E-03

1.10E-03

18.0%

4

348.2

1.00E-02

7.16E-04

7.1%

5

363.2

2.01E-02

5.33E-03

26.5%

6

378.2

4.62E-02

2.94E-03

6.4%

7

393.2

6.68E-02

1.47E-02

21.9%

8

408.2

1.09E-01

2.50E-02

23.0%

In this table, E-0X represents multiplication with 10-x.

Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation

 

The graph 1/T vs. log (p) shows a straight line with a correlation coefficient of - 0.9923.

 

For the test item LUMULSE GMT-K, the following vapour pressures at 20 °C and at 25 °C were calculated from the regression equation:

Vapour pressure at 20 °C: 1.00 * 10-03Pa

Vapour pressure at 25 °C: 1.32 * 10-03Pa