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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:
19.08.2011 - 09.11.2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: vapour pressure balance
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Temp.:
50 °C
Vapour pressure:
0 Pa

The vapour pressure was measured in the temperature range of 29 °C to 131 °C. Above 67 °C a vapour pressure could be measured.

Temperature / °C

Vapour pressure / hPa

67.4

9.8E-6

73.9

2.0E-5

79.3

3.6E-5

86.4

6.0E-5

89.6

6.7E-5

95.8

1.4E-4

101.2

1.6E-4

107.1

2.8E-4

113.8

4.2E-4

119.5

7.0E-4

125.1

1.2E-3

130.5

1.9E-3

 

The values for 20, 25 and 50 °C were calculated, using the Antoine constants A, B and C.

T/°C

log (p/hPa) = A+B/(C+T[°C])

p/hPa

p/Pa

20

A = 8.99633

5.7E-8

5.7E-6

25

B = -4760.98

1.1E-7

1.1E-5

50

C = 273.15

1.8E-6

1.8E-4

 

Conclusions:
The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively.
Executive summary:

A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure was measured in the temperature range of 29 °C to 131 °C using the effusion method (vapour pressure balance). Above 67 °C a vapour pressure could be measured. The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively.

Description of key information

The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively.

Key value for chemical safety assessment

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

Additional information

A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure was measured in the temperature range of 29 °C to 131 °C using the effusion method (vapour pressure balance). Above 67 °C a vapour pressure could be measured. The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The vapour pressure of the test substance was determined to be 5.7E-6 Pa at 20 °C, 1.1E-5 at 25 °C and 1.8E-4 at 50 °C, respectively (reference 4.6-1).