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Physical & Chemical properties

Vapour pressure

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Description of key information

A vapour pressure value of 0.019 Pa at 20°C was determined in a reliable study conducted according to OECD guideline 104 and in compliance with GLP.  

Key value for chemical safety assessment

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

Additional information

At the beginning of the test the vapour pressure of the test substance decreased slightly every next measurement, due to the removal of volatile impurities. After measurement 15 this decrease became negligible and the vapour pressure was stable. So from that moment on the collected data were used for the final result. For each temperature a selected number of measurements was used for the calculations.

For the measurements at 31.63 and 24.95°C a correction according to Bennett and Tompkins were applied, as the measured vapour pressures were below 0.1 Pa.

The resulting values were plotted against the reciprocal temperature [T-1]. Fitting the data according to Clark&Glew provides a value of 0.019 Pa with 0.0016 Pa (standard deviation of 0.0002 Pa) for the vapour pressure of the test substance at 20°C.