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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
2013-08-20 to 2013-09-23
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
not conducted in accordance with known quality system
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
Type of method:
thermal analysis
Differential Scanning Calorimetry (DSC)
Melting / freezing pt.:
-55.6 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: -55.6±0.5°C
A melting point value of -55.6±0.5°C was obtained using an appropriate test method. The result is considered to be reliable.

Description of key information

Melting point (2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane): -55.6±0.5°C (OECD 102)e

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-55.6 °C

Additional information

Four reliable studies are available for the melting point of Vi4-D4. A melting point value of -55.6±0.5°C was obtained for the substance in accordance with EU Method A.1 and OECD Guideline 102 but not in compliance with any known quality system. The result is considered to be reliable and selected as key study.

This result is supported by measured melting point values for Vi4-D4 of -43.5°C, -42.7°C and <-80°C

which were determined using relevant methods.

All available studies report that the melting point of the substance is <-20°C.