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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:
16 February 2016 to 01 December 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Specific details on test material used for the study:
Purity: 95.4% w/w
Batch: L002
Physical State / Appearance: Pale yellow liquid
Expiry Date: 31 December 2016
Storage Conditions: Room temperature in the dark
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
0.03 Pa
Remarks on result:
other: See Table 1
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.029 Pa
Remarks on result:
other: See Table 2

Table 1            Determination of the vapour pressure of the test substance (Run 1)

 

Temperature

Mass

Condensation

Vapour pressure

a

Corrected vapour

1/Temperature

Log

(°C)

difference

rate

(Pa)

 

pressure (Pa)

(1/K)

vapour

 

(µg)

(µg/s)

From

From

 

From

From

 

pressure

 

 

 

Mass

Condensation

 

Mass

Condensation

 

 

 

 

 

difference

 

 

difference

 

 

 

 

 

 

 

 

 

 

 

 

 

22.5

17.37

0.353

0.02864

0.01300

0.370

0.03514

0.03514

0.00338

-1.45

26.0

16.04

-

0.02644

-

-

0.02644

-

0.00334

-1.58

28.5

21.83

-

0.03598

-

-

0.03598

-

0.00332

-1.44

31.5

31.07

-

0.05122

-

-

0.05122

-

0.00328

-1.29

35.0

44.77

-

0.07380

-

-

0.07380

-

0.00325

-1.13

37.5

59.80

-

0.09859

-

-

0.09859

-

0.00322

-1.01

40.5

83.52

-

0.13769

-

-

0.13769

-

0.00319

-0.86

43.5

116.92

-

0.19277

-

-

0.19277

-

0.00316

-0.71

46.5

157.01

-

0.25886

-

-

0.25886

-

0.00313

-0.59

 

 

 

 

 

 

 

 

 

 

Table 2            Determination of the vapour pressure of the test substance (Run 2)

 

Temperature

Mass

Condensation

Vapour pressure

a

Corrected vapour

1/Temperature

Log

(°C)

difference

rate

(Pa)

 

pressure (Pa)

(1/K)

vapour

 

(µg)

(µg/s)

From

From

 

From

From

 

pressure

 

 

 

Mass

Condensation

 

Mass

Condensation

 

 

 

 

 

difference

 

 

difference

 

 

 

 

 

 

 

 

 

 

 

 

 

25.5

20.82

0.232

0.03433

0.00856

0.222

0.03861

0.03861

0.00335

-1.41

29.5

24.28

-

0.04002

-

-

0.04002

-

0.00330

-1.40

32.5

33.41

-

0.05508

-

-

0.05508

-

0.00327

-1.26

35.5

48.44

-

0.07986

-

-

0.07986

-

0.00324

-1.10

38.5

66.81

-

0.11015

-

-

0.11015

-

0.00321

-0.96

41.5

93.54

-

0.15422

-

-

0.15422

-

0.00318

-0.81

44.5

124.72

-

0.20562

-

-

0.20562

-

0.00315

-0.69

47.5

167.03

-

0.27539

-

-

0.27539

-

0.00312

-0.56

 

 

 

 

 

 

 

 

 

 

 a: degree of condensation

Conclusions:
The vapour pressure of the test substance was found to be 3.0 x 10-2 Pa at 25°C.

Description of key information

The mean vapour pressure at 25ºC was 2.95 x 10-2Pa.

Key value for chemical safety assessment

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

Additional information