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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:
18 MAY 2009 - 30 JUL 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same 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)
Version / remarks:
2006
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: vapour pressure balance
Temp.:
25 °C
Vapour pressure:
0 hPa

The vapour pressure was measured in the temperature range of 23 °C to 70 °C. Above 33 °C a vapour pressure could be measured. The measured vapour pressures at the corresponding temperatures are listed in the following table:

 Temperature [°C]  Vapour pressure [hPa]
 32.9  1.7 x 10 -4
 36.4  3.4 x 10 -4
 37.6  4.2 x 10 -4
 39.2  4.3 x 10 -4
 40.1  5.2 x 10 -4
 42.4  6.5 x 10 -4
 45.8  1.1 x 10 -3
 49.1  1.5 x 10 -3
 55.3  3.4 x 10 -3
 60.6  6.4 x 10 -3
66.1   1.1 x 10-2
 70.0  1.6 x 10-2

The figure (attached as background material) gives the vapour pressure (logarithmic scale) as a function of the inverse temperature (1/T, T in Kelvin). Only for better readability the temperature is reported in a centigrade scale. The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as shown there.

 T [°C]  p [hPa]  p [Pa]
 20  3.2 x 10-5  3.2 x 10-3
 25  6.7 x 10-5  6.7 x 10-3
 50  1.7 x 10-3  1.7 x 10-1
Conclusions:
The vapour pressure of the test item is caluclated by extrapolation:
20 °C: 0.000032 hPa
25 °C: 0.000067 hPa
50 °C: 0.0017 hPa
Executive summary:

The vapour pressure of the sample was tested according to EU Method A.4 and OECD Guideline 104 in a non-GLP study with the effusion method.

The vapour pressure of the test item is caluclated by extrapolation:

20 °C: 0.000032 hPa

25 °C: 0.000067 hPa

50 °C: 0.0017 hPa

Description of key information

The vapour pressure of CC-5 -V was tested according to EU Method A.4 and OECD Guideline 104 in a non-GLP study with the effusion method.

The vapour pressure of the test item is caluclated by extrapolation:

20 °C: 0.000032 hPa

25 °C: 0.000067 hPa

50 °C: 0.0017 hPa

Key value for chemical safety assessment

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

Additional information

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