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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Viscosity

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
viscosity
Type of information:
(Q)SAR
Adequacy of study:
key study
Study period:
2012
Reliability:
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 correlation between boiling point and viscosity has been used in previous models for the calculation of viscosity.
The current model is closely related to the following models for the calculation of the viscosity of other classes of organosilicon compounds:
- Prediction of the viscosity of chlorosilanes from boiling point
- Prediction of the viscosity of methoxysilanes from boiling point
- Prediction of the viscosity of linear siloxanes from boiling point
- Prediction of the viscosity of cyclic siloxanes from boiling point
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
0.9
Conclusions:
A static viscosity of 0.9 mm²/s at 20°C has been obtained for the test substance using an accepted calculation method. The result is considered reliable.

Description of key information

Viscosity (static): 0.9 mm²/s at 20°C (QSAR)

 

Key value for chemical safety assessment

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

Additional information

A predicted static viscosity value of 0.9 mm2/s at 20°C was obtained using an appropriate calculation method. The result is considered to be reliable. This is supported by a measured static viscosity value of 0.65 mm²/s at 25°C from a secondary source (company data). The supporting result is in good agreement with the key study. Another secondary source (company data) gives a dynamic viscosity value of 0.7 mPa s at 20°C.