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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:
17 Jun - 13 Jul 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: vapour pressure balance
Temp.:
25 °C
Vapour pressure:
0.29 Pa
Remarks on result:
other: No apparent change in the appearance of the test item was noted over the duration of the test.
Transition / decomposition:
no

The results from runs 2 to 6 are shown in the following tables:

 

Run 2:

Temperature (°C)

Temperature (K)

Reciprocal Temperature (K-1)

Mass Difference (mg)

Mass Difference (kg)

Vapour pressure (Pa)

log10Vp

10

283.15

0.003531697

37.67

3.767E-8

0.052295611

-1.281534759

11

284.15

0.003519268

40.80

4.080E-8

0.056640853

-1.246870216

12

285.15

0.003506926

46.88

4.688E-8

0.065081451

-1.186542776

13

286.15

0.003494671

52.77

5.277E-8

0.073258280

-1.135143285

14

287.15

0.003482500

58.54

5.854E-8

0.081268518

-1.090077661

15

288.15

0.003470415

67.65

6.765E-8

0.093915532

-1.027262578

16

289.15

0.003458413

74.63

7.463E-8

0.103605560

-0.984616937

17

290.15

0.003446493

83.10

8.310E-8

0.115364090

-0.937929355

18

291.15

0.003434656

93.21

9.321E-8

0.129399360

-0.888067871

19

292.15

0.003422899

106.70

1.067E-7

0.148126936

-0.829365959

20

293.15

0.003411223

132.63

1.326E-7

0.184124420

-0.734888609

 

Run 3: 

Temperature (°C)

Temperature (K)

Reciprocal Temperature (K-1)

Mass Difference (mg)

Mass Difference (kg)

Vapour pressure (Pa)

log10Vp

10

283.15

0.003531697

36.46

3.646E-8

0.050615821

-1.295713714

11

284.15

0.003519268

38.06

3.806E-8

0.052837031

-1.277061595

12

285.15

0.003506926

44.39

4.439E-8

0.061624693

-1.210245234

13

286.15

0.003494671

49.50

4.950E-8

0.068718682

-1.162925180

14

287.15

0.003482500

55.49

5.549E-8

0.077034336

-1.113315654

15

288.15

0.003470415

62.76

6.276E-8

0.087126959

-1.059847444

16

289.15

0.003458413

71.70

7.170E-8

0.099537969

-1.002011223

17

290.15

0.003446493

89.81

8.981E-8

0.124679289

-0.904205682

18

291.15

0.003434656

93.14

9.314E-8

0.129302182

-0.888394145

19

292.15

0.003422899

106.40

1.064E-7

0.147710460

-0.830588751

20

293.15

0.003411223

123.47

1.235E-7

0.171407993

-0.765968931

 

 Run 4:

Temperature (°C)

Temperature (K)

Reciprocal Temperature (K-1)

Mass Difference (mg)

Mass Difference (kg)

Vapour pressure (Pa)

log10Vp

10

283.15

0.003531697

32.45

3.245E-8

0.045048914

-1.346315678

11

284.15

0.003519268

36.05

3.605E-8

0.050046636

-1.300625110

12

285.15

0.003506926

39.23

3.923E-8

0.054461291

-1.263912071

13

286.15

0.003494671

44.07

4.407E-8

0.061180451

-1.213387328

14

287.15

0.003482500

48.49

4.849E-8

0.067316543

-1.171878195

15

288.15

0.003470415

57.32

5.732E-8

0.079574845

-1.099224197

16

289.15

0.003458413

64.91

6.491E-8

0.090111710

-1.045218770

17

290.15

0.003446493

76.17

7.617E-8

0.105743475

-0.975746423

18

291.15

0.003434656

85.62

8.562E-8

0.118862496

-0.924955155

19

292.15

0.003422899

99.18

9.918E-8

0.137687250

-0.861106275

20

293.15

0.003411223

114.53

1.145E-7

0.158996982

-0.798611118

 

 Run 5:

Temperature (°C)

Temperature (K)

Reciprocal Temperature (K-1)

Mass Difference (mg)

Mass Difference (kg)

Vapour pressure (Pa)

log10Vp

10

283.15

0.003531697

30.83

3.083E-8

0.042799939

-1.368556854

11

284.15

0.003519268

32.92

3.292E-8

0.045701394

-1.340070552

12

285.15

0.003506926

37.63

3.763E-8

0.052240081

-1.281996160

13

286.15

0.003494671

43.25

4.325E-8

0.060042081

-1.221544267

14

287.15

0.003482500

46.57

4.657E-8

0.064651091

-1.189424141

15

288.15

0.003470415

56.07

5.607E-8

0.077839525

-1.108799823

16

289.15

0.003458413

62.13

6.213E-8

0.086252358

-1.064229025

17

290.15

0.003446493

71.41

7.141E-8

0.099135375

-1.003771346

18

291.15

0.003434656

81.02

8.102E-8

0.112476517

-0.948938140

19

292.15

0.003422899

105.70

1.057E-7

0.146738680

-0.833455391

20

293.15

0.003411223

109.54

1.095E-7

0.152069584

-0.817957642

 

 Run 6:

Temperature (°C)

Temperature (K)

Reciprocal Temperature (K-1)

Mass Difference (mg)

Mass Difference (kg)

Vapour pressure (Pa)

log10Vp

10

283.15

0.003531697

28.16

2.816E-8

0.039093295

-1.407897728

11

284.15

0.003519268

31.95

3.195E-8

0.044354786

-1.353059516

12

285.15

0.003506926

34.81

3.481E-8

0.048325198

-1.315826355

13

286.15

0.003494671

40.96

4.096E-8

0.056862974

-1.245170431

14

287.15

0.003482500

46.61

4.661E-8

0.064706621

-1.189051276

15

288.15

0.003470415

53.18

5.318E-8

0.073827465

-1.131782046

16

289.15

0.003458413

61.48

6.148E-8

0.085349991

-1.068796520

17

290.15

0.003446493

67.38

6.738E-8

0.093540703

-1.028999372

18

291.15

0.003434656

79.34

7.934E-8

0.110144247

-0.958038183

19

292.15

0.003422899

95.48

9.548E-8

0.132550702

-0.877617968

20

293.15

0.003411223

110.17

1.102E-7

0.152944185

-0.815467029

 

Statistical data using an unweighted least squares method and the common logarithm of the vapour pressure at 25 °C (298 K) generated from the runs are shown in the following table:

Run

Slope

SD of Slope

Intercept

SD of Intercept

log10Vp at 25 °C

1

n/a

n/a

n/a

n/a

n/a

2

-4374

122

14.149

0.422

-0.520

3

-4548

135

14.738

0.470

-0.515

4

-4612

129

14.915

0.448

-0.552

5

-4781

172

15.486

0.597

-0.549

6

-4895

111

15.863

0.384

-0.555

SD - standard deviation

Mean log10Vp at 25 °C: -0.538

Description of key information

0.29 Pa at 25 °C

Key value for chemical safety assessment

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

Additional information

Vapour pressure balance, OECD 104. Handbook data is disregarded due to inconsistency.