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Physical & Chemical properties

Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-04-03 to 2009-10-23
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
yes
Remarks:
Viscosity at 40 °C not determined; deviation does not affect validity of determinations at other temperatures.
GLP compliance:
yes
Type of method:
rotational viscometer (dynamic)
Specific details on test material used for the study:
Batch No.: 20090302
Purity: 99.42%
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
44.2
Key result
Temp.:
other: 25.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
30.4

Substance Temperature RPM Torque (%) Viscosity (mPa.s) Mean (mPa.s) 
DEHCH 20.0 °C ± 0.1 100 72.8 44.3 44.2
72.6 44.1
25.0 °C ± 0.1 50.5 30.3 30.4
50.7 30.5
DEHP(reference sample)   20.0 °C ± 0.1 50 69.4 83.3 83.2   
69.2 83.0
25.0 °C ± 0.1 42.5 54.3 54.2
42.3 54.1
Conclusions:
The viscosity at 20°C and 25°C was determined to be 44.2 mPa s (dynamic) and 30.4 mPa s (dynamic) respectively.

Description of key information

Viscosity: 44.2 mPa · s (dynamic) at 20 °C (OECD 114)

Key value for chemical safety assessment

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

Additional information

The viscosity was determined to be 44.2 mPa · s (dynamic) at 20 °C. Divided by the density at 20 °C, this corresponds to a kinematic viscosity of 46.33 (mm²/s).

However, because the study did not determine the viscosity at 40 °C in line with the OECD Guideline 114, the "Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance", and Regulation (EC) No. 1272/2008, it is also necessary to submit a testing proposal to cover viscosity at 40 °C in order to determine whether or not the substance presents an aspiration hazard.