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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
no guideline followed
Principles of method if other than guideline:
Determination of freezing temperature in a dry ice/acetone cooling bath, based on visual estimation.
GLP compliance:
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
-23 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: Atmospheric pressure assumed to be normal.


A melting point of -3 °C was found for Dodecamethylcyclohexasiloxane. A freezing point for the sample of the substance was observed at -23 °C.


The melting/freezing point temperature for the substance was found to be -23 °C.

A melting point value of -23 °C at 1013 hPa was determined in a reliable study conducted according to an appropriate test protocol. It was not compliant with GLP.

Description of key information

[3-(trimethoxysilyl)propyl]urea: -23 °C at 1013 hPa

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-23 °C

Additional information

A melting point value of -23 °C at 1013 hPa was obtained for the parent substance using a method similar to EU A.1.