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Physical & Chemical properties

Melting point / freezing point

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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.