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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:
11.11.2008 - 22.01.2009
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 28 °C to 146 °C. Above 106 °C a vapour pressure could be measured.

Temperature / °C

Vapour pressure / hPa

106.2

1.3E-5

111.6

2.4E-5

117.7

5.1E-5

125.0

1.0E-4

129.7

1.7E-4

132.8

2.4E-4

137.0

3.4E-4

140.6

4.5E-4

145.8

7.7E-4

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 = 13.75370

4.5E-11

4.5E-9

25

B = -7064.79

1.1E-10

1.1E-8

50

C = 273.15

7.8E-9

7.8E-7

 

Conclusions:
The vapour pressure of the test substance was determined to be 4.5E-9 Pa at 20 °C, 1.1E-8 at 25 °C and 7.8E-7 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 28 °C to 146 °C using the effusion method (vapour pressure balance). Above 106 °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 4.5E-9 Pa at 20 °C, 1.1E-8 at 25 °C and 7.8E-7 at 50 °C, respectively.

Description of key information

The vapour pressure of the test substance was determined to be 4.5E-9 Pa at 20 °C, 1.1E-8 at 25 °C and 7.8E-7 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 28 °C to 146 °C using the effusion method. Above 106 °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 4.5E-9 Pa at 20 °C, 1.1E-8 at 25 °C and 7.8E-7 at 50 °C, respectively (reference 4.6-1).