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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:
June - August 2000
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: vapour pressure balance
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 Pa
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
0.007 Pa

Vapour pressure balance (resutls)

Temperature [°C]

vapour pressure [hPa]

45.1

3.4 x 10E-5

54.5

1.1 x 10E-4

62.9

3.6 x 10E-4

67.6

7.1 x 10E-4

68.2

7.1 x 10E-4

75.3

1.6 x 10E-3

80.2

2.9 x 10E-3

86.9

5.5 x 10E-3

88.2

5.9 x 10E-3

92.0

8.6 x 10E-3

98.2

1.6 x 10E-2

 

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

The calculated vapour pressure values are:

p(20°C) = 8.8 x 10E-5 Pa
p(25
°C} = 1.9 x 10E-4 Pa
p(50
°C) = 6.9 x 10E-3 Pa

 

Conclusions:
The vapour pressure of the test item at 25°C was determined to be 0.000195 Pa.
Executive summary:

A study was conducted according to 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 21 to 98 °C. The values for 20, 25, and 50 °C are calculated, using the Antoine constants A, B and C. The vapour pressure of the test item at 20, 25 and 50°C were determined to be 8.8E-5 Pa, 1.9E-4 Pa and 6.9E-3 Pa respectively.

Description of key information

The vapour pressure of the test item at 25°C was determined to be 0.000195 Pa (reference 4.6 -1).

Key value for chemical safety assessment

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

Additional information

A study was conducted according to, 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 21 to 98 °C. The values for 20, 25, and 50 °C are calculated, using the Antoine constants A, B and C. The vapour pressure of the test item at 20, 25 and 50°C were determined to be 8.8E-5 Pa, 1.9E-4 Pa and 6.9E-3 Pa respectively.