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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Description of key information

Vapour pressure (dodecamethylpentasiloxane): 7.8 Pa at 25°C (QSAR)

Key value for chemical safety assessment

Vapour pressure:
7.8 Pa
at the temperature of:
25 °C

Additional information

A predicted vapour pressure of 7.8 Pa at 25°C was determined for the substance using a validated QSAR estimation method. The result is considered to be reliable and selected as key study. This value is supported by a vapour pressure of 6±0.5 Pa at 25°C which was based on estimation correlating retention time with temperature. In a secondary source to which no reliability could be assigned, vapour pressure value of 7.99 Pa at 25°C was reported for the substance. The supporting study is in good agreement with the key study.