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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental starting date: 17 March 2016 Experimental completion date: 19 March 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
The vapor pressure has been determined at two temperatures using the vapor pressure balance method, designed to be compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
0.254 Pa
Key result
Test no.:
#1
Temp.:
80 °C
Vapour pressure:
0.687 Pa

Results Preliminary Run

The recorded temperatures and the calculated vapor pressure values for the preliminary run are shown in the following table:

 

Preliminary Run Vapor PressureData

 

 

Temperature(ºC)

 

Temperature(K)

Vapor Pressure (Pa)

 

Temperature(ºC)

 

Temperature(K)

VaporPressure(Pa)

20

293.15

0.103383439

51

324.15

0.105451941

21

294.15

0.088404155

52

325.15

0.116280339

22

295.15

0.084503155

53

326.15

0.129316065

23

296.15

0.086169062

54

327.15

0.139117154

24

297.15

0.084989044

55

328.15

0.150778506

25

298.15

0.085919176

56

329.15

0.161829025

26

299.15

0.089889589

57

330.15

0.173643085

27

300.15

0.092666101

58

331.15

0.184471484

28

301.15

0.093873884

59

332.15

0.196216131

29

302.15

0.093471290

60

333.15

0.207683127

30

303.15

0.096567101

61

334.15

0.224217259

31

304.15

0.094498599

62

335.15

0.236822625

32

305.15

0.089625820

63

336.15

0.251385432

33

306.15

0.080185678

64

337.15

0.266781194

34

307.15

0.064887095

65

338.15

0.287535624

35

308.15

0.052906444

66

339.15

0.309817136

36

309.15

0.045909632

67

340.15

0.327531285

37

310.15

0.041911455

68

341.15

0.349077021

38

311.15

0.041356152

69

342.15

0.376272960

39

312.15

0.043174768

70

343.15

0.403621607

40

313.15

0.042314049

71

344.15

0.433663471

41

314.15

0.046228931

72

345.15

0.470882620

42

315.15

0.049394156

73

346.15

0.511641822

43

316.15

0.052253963

74

347.15

0.553414451

44

317.15

0.056210493

75

348.15

0.601434233

45

318.15

0.059167479

76

349.15

0.646066670

46

319.15

0.063734842

77

350.15

0.702860231

47

320.15

0.069232337

78

351.15

0.767552970

48

321.15

0.077187045

79

352.15

0.825915260

49

322.15

0.086085767

80

353.15

0.897563163

50

323.15

0.093998827

 


 

 

See attached for Figure 2           Preliminary Run Vapor Pressure Data

 

 

Definitive Runs

 The direct values of the vapor pressure at 25 °C are shown in the following table and attached graph:

 

Vapor Pressure Data at 25°C

 

 

Run

 

Mass Difference (µg)

 

Vapor Pressure (Pa)

2

246.79

0.342607747

3

193.18

0.268183332

4

177.19

0.245985116

5

155.89

0.216415259

6

211.14

0.293116414

7

214.69

0.298044723

8

175.54

0.243694493

9

190.48

0.264435041

10

81.31

0.112879112

 

Mean vapor pressure at 25 °C: 0.254 Pa

 

See attached for Figure3           Graph of Vapor Pressure Data at 25°C

The test item did not change in appearance during the determination.


 

 

The direct values of the vapor pressure at 80 °C are shown in the following table and graph:

 

Vapor Pressure Data at 80°C

 

 

Run

 

Mass Difference (µg)

 

Vapor Pressure (Pa)

1

522.92

0.725946931

2

500.56

0.694905523

3

473.96

0.657977908

4

505.46

0.701707978

5

459.62

0.638070314

6

462.53

0.64211014

7

479.55

0.66573826

8

472.63

0.656131527

9

536.32

0.744549564

10

537.88

0.746715244

 

Mean vapor pressure at 80 °C: 0.687 Pa

 

See attached for Figure 4            Graph of Vapor Pressure Data at 80°C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The test item did not change in appearance during the determination.

Conclusions:
The vapor pressure of the test item has been determined at two temperatures and the results are shown in the following table.

Table 5
Temperature (°C) Temperature (K) Vapor Pressure (Pa)
25 298 0.254
80 353 0.687
Executive summary:

The vapor pressure of the test item has been determined at two temperatures using the vapor pressure balance method, designed to be compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.

 

Summary of vapor pressure

 

 

Temperature (°C)

 

Temperature (K)

 

Vapor Pressure (Pa)

25

298

0.254

80

353

0.687

Description of key information

The vapor pressure of the test item has been determined at two temperatures and the results are shown in the following table.

 

Table 5

 

 

Temperature (°C)

 

Temperature (K)

 

Vapor Pressure (Pa)

25

298

0.254

80

353

0.687

Key value for chemical safety assessment

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

Additional information