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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

density, other
Type of information:
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
See attached QMRF/QPRF
Principles of method if other than guideline:
The result was obtained using an appropriate QSAR method (see attached QMRF and QPRF for details).

The model for density has been developed for, and applies specifically to, organosilicon compounds. It is a multiple linear regression based model with descriptors representing counts of different atoms and groups that may be present in the molecule.
Key result
0.97 g/cm³
20 °C
A density value of 0.97 g/cm3 has been determined for the substance using an appropriate estimation method. The result is considered reliable.

Description of key information

Density:  0.97 g/cm3 at 20°C (QSAR)

Key value for chemical safety assessment

Additional information

A predicted density of 0.97 g/cm3 at 20°C was determined for the registered substance using a reliable validated QSAR estimation method, the result is selected as key study.

In a secondary source to which reliability could not be assigned, a relative density of 1.054 at 25°C was reported for the substance. Although, the available results are on the different sides of the known water solubility of water (relative density = 1.0), the key result is considered adequate to use for the chemical safety assessment since the prediction is very close to 1.