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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
dynamic method
Temp.:
20 °C
Vapour pressure:
< 0 hPa
Remarks on result:
other: calculated from the regression curve
Temp.:
25 °C
Vapour pressure:
< 0 hPa
Remarks on result:
other: calculated from the regression curve
Temp.:
50 °C
Vapour pressure:
0 hPa
Remarks on result:
other: calculated from the regression curve

Results:

Temperature (°C) Vapour pressure (hPa)
cell 3 cell 7
41.8 2.14 x 10-6 2.07 x 10-6
51.9 7.34 x 10-6 7.53 x 10-6
64.0 3.44 x 10-5 3.59 x 10-5

The regression of the results leads with a mean deviation of 3% to the following equation:

ln(p/hPa) = 29.6902 - 13471.33/(T/K)

The vapour pressure at 20, 25 and 50°C was calculated from the regression equation

Vapour pressures calculated from the regression equation:

Temperature (°C) Vapour Pressure (hPa)
20 < 1 x 10-6
25 < 1.0 x 10-6
50 6.2 x 10-6
Conclusions:
The vapour pressure of the test substance is < 1 x 10-6 hPa at 20°C and 25°C and 6.2 x 10-6 hPa at 50°C.
Executive summary:

The vapour pressure of the test substance was tested in accordance with OECD guideline 104 and found to be <1x10-6 hPa at 20°C and 25°C and 6.2 x 10-6 hPa at 50°C, respectively.

Description of key information

Vapour pressure: 
20 °: < 1x10-6 hPa
25 °C: < 1x10-6 hPa
50 °C: 6.2x10-6 hPa

Key value for chemical safety assessment

Vapour pressure:
0 hPa
at the temperature of:
20 °C

Additional information

The vapour pressure of the test substance is < 1 x 10-6 hPa at 20°C and 25°C and 6.2 x 10-6 hPa at 50°C, respectively.