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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Description of key information

Melting point (hexamethyldisiloxane): -68.2°C at 101.3 kPa

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-68.2 °C

Additional information

A melting point value of -68.2°C was reported for the substance in a collection of reliable data which has been subject to peer-review and in which the original data sources are traceable. The result is considered to be reliable and is assigned as key study. This value is supported by another melting point of -66°C which was reported for the substance in a handbook or collection of reliable data.

In secondary sources to which no reliability can be assigned, melting point values of -68°C, and -68.2 to -68.7°C were reported for the substance.