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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

Data on similar source substances used for read across

0.0025mmHg @ 25C (equivalent to 0.33Pa)

<1Pa @ 20C

QSAR estimate 0.07Pa @ 25C

QSAR estimate for 3,6,9,12-tetraoxahexadecan-1-ol: 0.0005Pa @ 25C

Key value for chemical safety assessment

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

Additional information

Reasonably consistent measured values are available from two sources for source read across substance, including values at different temperatures. A reliable QSAR predicts that the vapour pressure of this same source substance will be at least an order of magnitude lower. This is feasible at the measured vapour pressure could be signfiicantly elevated by the presence of more volatile impurities that are likely to be present in commercially produced product. The same QSAR predicts that the vapour pressure of 3,6,9,12-tetraoxahexadecan-1-ol will be a further order of magnitude lower than the source substance. The QSAR can be used as a bridging tool. A very conservative approach would be to use the value from the lower molecular weight source substance - however this is considered to be unnecessarily conservative. As a more realistic but still conservative approach, the value taken is one twentieth of the measured value for the source substance - the same difference betweeen th QSAR values for DEGBE and TEGBE.