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Vapour pressure

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Description of key information

Key experimental value of vapour pressure at 20°C: 30 Pa +/- 2 Pa
Supporting experimental value of vapour pressure at 20°C: 88.4 +/- 3.3 Pa

Key value for chemical safety assessment

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

Additional information

The vapour pressure was determined in two studies using the same method: the static method.

These determinations have been performed according recognized international guidelines and under GLP. No deviations from the guidelines was observed in these studies.

In the supporting study, the sample has not been outgassed in the apparatus at low temperature before the measurement of the vapour pressure. The outgassing have been performed in the key study. This difference can explained the gap between the key value and the supporting value. Indeed, some volatile impurities have probably affected the value of vapour pressure determined in the supporting study.

As recommended in the ECHA Guidance document R 7.A, the vapour pressure obtained with the lowest influence of volatile impurities of the test substance was chosen as the key value.