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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:
2013
Reliability:
1 (reliable without restriction)
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
no
Type of method:
effusion method: vapour pressure balance
Temp.:
-19.77 °C
Vapour pressure:
5.148 - 5.264 Pa
Temp.:
-14.75 °C
Vapour pressure:
9.267 - 9.454 Pa
Temp.:
-9.82 °C
Vapour pressure:
14.425 - 14.704 Pa
Temp.:
20 °C
Vapour pressure:
213.57 Pa
Remarks on result:
other: calculated from experimental values
Temp.:
25 °C
Vapour pressure:
317 Pa
Remarks on result:
other: calculated from experimental values
Temp.:
50 °C
Vapour pressure:
1 900.9 Pa
Remarks on result:
other: calculated from experimental values
Temp.:
55 °C
Vapour pressure:
2 632.2 Pa
  Areas and transmission propability factors ot the effusion orifices used in the present work:
 Cell  l/mm  A0/mm2  W0
 I  0.050  0.779  0.964
 IV  0.025  0.776  0.981
Conclusions:
The vapour pressure of the test item is 213.57 Pa at 20 °C.
Executive summary:

The vapor pressure of the test item was measured using the Knudsen effusion method (mass-loss technique), according to the

guidelines OECD 104 / EU A.4. The quality of the apparatus was previously verified with the measurement of well-known reference compounds. Experiments were performed at three temperatures between -19.77°C and -9.82°C. For every experiment (temperature), two effusion cells were used simultaneously. 2 different cells were used in the experiments, with effusion orifices of approx. 0,8 mm in diameter, with a thickness of 0.05 mm or 0.025 mm. Results permit the establishment of the relation between the vapor pressure of the compound and temperature, allowing the knowledge of the vapor pressure at different temperatures. Based on the results, the vapor pressure of the compound is calculated as being equal to 213.57 Pa at 20°C, and 317.00 Pa at 25°C.

Description of key information

Benzyldimethylamine is characterized by a measured vapour pressure of 213.57 Pa (20 °C) (Bayer Technology Services, 2013).

Key value for chemical safety assessment

Vapour pressure:
213.57 Pa
at the temperature of:
20 °C

Additional information