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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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
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 viscosity has been developed for, and applies specifically to methoxysilane compounds. It is a linear regression based model with the normal boiling point of the substance as the single descriptor.
Key result
kinematic viscosity (in mm²/s)
A kinematic viscosity value of 1.8 mm2/s was obtained using an accepted calculation method. The result is considered to be reliable.

Description of key information

Viscosity: 1.8 mm2/s at 20°C (QSAR)

Key value for chemical safety assessment

1.8 mm²/s (static)
at the temperature of:
20 °C

Additional information

A predicted kinematic viscosity of 1.8 mm2/s at 20°C was determined for the substance using a validated QSAR estimation method. The result is considered to be reliable and selected as key study.

In a secondary source to which reliability could not be assigned, dynamic viscosity value of 2 mPa.s at 20°C was reported for the substance.