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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well conducted study according to OECD guideline under Internal management system, certificate of analysis included in the report.
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Version / remarks:
Adopted May 12, 1981
Deviations:
no
GLP compliance:
no
Remarks:
Internal management system
Type of method:
rotational viscometer (dynamic)
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
7.5

The rheometer was calibrated at 13-12-2011.
A calibration check was performed prior to the measurement . The estimated accuracy is ± 1%.

Viscosity measurement of the REACH test substance, batch no. 0905530079

di-tert-butyl 3,3,5-trimethylcyclohexylidene diperoxide at 20°C (duplicate)

1.5 RPM

34.5 mPa.s

35.6 mPa.s

3 RPM

35.3 mPa.s

35.6 mPa.s

6 RPM

35.4 mPa.s

35.3 mPa.s

As there was no effect due to shear rate, the average viscosity value can be set at 35.5mPa.s at 3 rpm (20°C).

Conclusions:
The viscosity of di-tert-butyl 3,3,5-trimethylcyclohexylidene diperoxide is 35.5 mPa.s at 20°C.
Executive summary:

The viscosity of di-tert-butyl 3,3,5-trimethylcyclohexylidene diperoxide(CAS 6731-36-8)was determined accordingto OECD Guideline 114, and in accordance with European Chemicals Agency (ECHA), Guidance on information requirements and chemical safety assessment, Chapter R.7a, Endpoint specific guidance, May 2008 .

 

The viscosity of the test substance is:

 

di-tert-butyl 3,3,5-trimethylcyclohexylidene diperoxide 20°C (duplicate)

1.5 RPM

34.5 mPa.s

35.6 mPa.s

3 RPM

35.3 mPa.s

35.6 mPa.s

6 RPM

35.4 mPa.s

35.3 mPa.s

Description of key information

The viscosity of di-tert-butyl 3,3,5-trimethylcyclohexylidene diperoxide is 35.5 mPa.s at 20°C.

Key value for chemical safety assessment

Viscosity:
35.5 mPa · s (dynamic)
at the temperature of:
20 °C

Additional information