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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:
Study plan 2012-01-13, Performance of study 2012-01-31, Draft report 2012-03-16, Final report 2012-03-22
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed according to official OECD TG method and GLP with certificate.
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Qualifier:
according to
Guideline:
other: EN ISO 12058-1:2002
GLP compliance:
yes (incl. certificate)
Type of method:
other: Rolling ball viscosimeter (following Hoeppler)
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
0.837

Measured values of viscosity:

First determination:

 Measurement  Temperature [° C]  Falling time [s]  Total time [s]  Viscosity [mPa*s]
 No. 1  19.96  55.87  55.87  0.8486
 No. 2  20.10  55.78  55.78  0.8472
 No. 3  20.04  55.72  55.72  0.8463
 Mean      55.79  0.8474
 Standard deviation      0.08  0.0011
 relative SD        0.14 %

Second determination:

 Measurement  Temperature [° C]  Falling time [s]  Total time [s]  Viscosity [mPa*s]
 No. 1  19.96  54.93  54.93  0.8343
 No. 2  19.95  54.69  54.69  0.8307
 No. 3  20.00  55.15  55.15  0.8376
 Mean      54.92  0.8342
 Standard deviation      0.23  0.0035
 relative SD        0.42 %

Third: determination:

 Measurement  Temperature [° C]  Falling time [s]  Total time [s]  Viscosity [mPa*s]
 No. 1  19.96  54.65  54.65  0.8300
 No. 2  20.00  54.87  54.87  0.8334
 No. 3  20.01  54.72  54.72  0.8311
 Mean      54.75  0.8315
 Standard deviation      0.11  0.0017
 relative SD        0.21 %

Fourth determination:

 Measurement  Temperature [° C]  Falling time [s]  Total time [s]  Viscosity [mPa*s]
 No. 1  19.96  55.38  55.38  0.8411
 No. 2  19.97  54.78  54.78  0.8320
 No. 3  20.00  54.87  54.87  0.8334
 Mean      55.01  0.8355
 Standard deviation      0.32  0.0049
 relative SD        0.59 %

Results of all determinations:

  Experiment 1   Experiment 2  Experiment 3  Experiment 4  Mean
 Determination  Viscosity [mPa*s]   Viscosity [mPa*s]  Viscosity [mPa*s]    Viscosity [mPa*s]  Viscosity [mPa*s] 
 1  0.8486  0.8343  0.8300  0.8411  
 2  0.8472  0.8307  0.8334  0.8320  
 3  0.8463  0.8376  0.8311  0.8334  
 Mean  0.8474  0.8342  0.8315  0.8355  0.837
 Standard deviation  0.0011  0.0035  0.0017  0.0049  0.007
 relative SD  0.14 %  0.42 %  0.21 %  0.59 %  0.82 %

The mean of each series of four measurements was calculated. The allowed maximum deviation of the means of two experiments for the used borosilicate glass was 2.0 %. As the measured relative standard deviation was 0.82 %, the validity criterion was met.

Conclusions:
The viscosity of the test substance diethyl carbonate was determined according to OECD Test Guideline 114 (Viscosity of Liquids). At all measurements, the falling time was smaller than 60 sec (minimum falling time). However, the measurements can be considered valid because the measured viscosity was within the measuring range of the used ball (borosilicate glass). The viscosity of the test item diethyl carbonate was calculated as 0.837+/-0.007 mPa*s at 20.0 °C, which was the mean of four experiments and 12 single values. As the measured relative standard deviation was 0.82 %, the validity criterion for the used ball was met (maximum relative SD 2.0 %).

Description of key information

The dynamic viscosity of the test substance diethyl carbonate was determined to be 0.837 +/- 0.007 mPa*s at 20.0 °C

Key value for chemical safety assessment

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

Additional information