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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:
09-04-2013-03-05-2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Version / remarks:
adopted 2 Oct 2012
Deviations:
no
Qualifier:
according to
Guideline:
other: EN ISO 12058-1 (2002)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
forced ball viscometer (dynamic)
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
68.644
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
26.661

All measured values and the corresponding calculation results are given in the following table:

 

Measured Values Viscosity 20 °C

 

First Determination 20 °C

 

Temperature

Falling Time

Total Time

 

Measurement

 

Time [min]

Time

[s]

Total Time [s]

Viscosity [mPa*s]

No. 1

20.02

1

10.00

70.00

68.6965

No. 2

20.00

1

9.94

69.94

68.6376

No. 3

20.02

1

10.01

70.01

68.7063

Mean

69.98

68.6801

Standard Deviation

0.04

0.0372

RSD

0.05%

 

Second Determination 20 °C

 

Temperature

Falling Time

Total Time

 

Measurement

 

Time [min]

Time

[s]

Total Time [s]

Viscosity [mPa*s]

No. 1

20.02

1

9.75

69.75

68.4511

No. 2

20.02

1

9.94

69.94

68.6376

No. 3

20.00

1

10.04

70.04

68.7357

Mean

69.91

68.6081

Standard Deviation

0.15

0.1446

RSD

0.21%

 

 

Measured Values Viscosity 40 °C

 

First Determination 40 °C

 

Temperature

Falling Time

Total Time

 

Measurement

 

Time [min]

Time

[s]

Total Time [s]

Viscosity [mPa*s]

No. 1

40.1

4

34.94

274.94

28.6693

No. 2

40.1

4

34.63

274.63

28.6369

No. 3

40.0

4

34.78

274.78

28.6526

Mean

274.78

28.6529

Standard Deviation

0.16

0.0162

RSD

0.06%

 

Second Determination 40 °C

 

Temperature

Falling Time

Total Time

 

Measurement

 

Time [min]

Time

[s]

Total Time [s]

Viscosity [mPa*s]

No. 1

40.1

4

35.00

275.00

28.6755

No. 2

40.0

4

34.81

274.81

28.6557

No. 3

40.0

4

35.03

275.03

28.6786

Mean

274.95

28.6700

Standard Deviation

0.12

0.0124

RSD

0.04%



Results of the single determinations with the respective standard deviation as well as the mean value and the standard deviation of all six individual experiments of both temperatures are presented in the following tables:

 

Results of all determinations at 20 °C

20°C

Experiment 1

Experiment 2

Mean

Determination

Viscosity in mPa*s

Viscosity in mPa*s

Viscosity in mPa*s

1

68.6965

68.4511

2

68.6376

68.6376

3

68.7063

68.7357

Mean

68.6801

68.6081

68.644

sd

0.0372

0.1446

0.051

RSD

0.07%

 

Results of all determinations at 40 °C

40°C

Experiment 1

Experiment 2

Mean

Determination

Viscosity in mPa*s

Viscosity in mPa*s

Viscosity in mPa*s

1

28.6693

28.6755

2

28.6369

28.6557

3

28.6526

28.6786

Mean

28.6529

28.6700

28.661

sd

0.0162

0.0124

0.012

RSD

0.04%

 

 

Conclusions:
The viscosity of SIKA Hardener LH was determined to be 68.644 ± 0.051 mPa*s at 20 °C and 28.661 ± 0.012 mPa*s at 40 °C respectively.
Executive summary:

A Study was conducted according to OECD TG 114 and EN ISO 12058-1 (2002) to determine the viscosity of the test item SIKA Hardener LH. Using a rolling ball viscosimeter according to Hoeppler, the viscosity was determined as two independent triplicate determinations at 20 °C and 40 °C respectively. The viscosity ofSIKA Hardener LH at 20 °Cwas determined to be 68.644 ± 0.051 mPa *s at 20.00±0.02 °C which is the mean of two values. Precision of the value is given as standard deviation of all six individual measurements. As the measured RSD was 0.07 %, the validity criterion was met. The viscosity ofSIKA Hardener LH at 40 °Cwas determined to be 28.661 ± 0.012 mPa *s at 40.0±0.1 °C which is the mean of two values. Precision of the value is given as standard deviation of all six individual measurements. As the measured RSD was 0.04 %, the validity criterion was met. No observations arousing doubts concerning the accuracy of the results and the validity of the study were made.

 

Description of key information

The viscosity of SIKA Hardener LH was determined to be 68.644 ± 0.051 mPa*s at 20 °C and 28.661 ± 0.012 mPa*s at 40 °C respectively.

Key value for chemical safety assessment

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

Additional information

A study was conducted according to OECD TG 114 and EN ISO 12058-1 (2002) to determine the viscosity of the test item SIKA Hardener LH. Using a rolling ball viscosimeter according to Hoeppler, the viscosity was determined as two independent triplicate determinations at 20 °C and 40 °C respectively. The viscosity ofSIKA Hardener LH at 20 °Cwas determined to be 68.644 ± 0.051 mPa *s at 20.00 ± 0.02 °C which is the mean of two values. Precision of the value is given as standard deviation of all six individual measurements. As the measured RSD was 0.07 %, the validity criterion was met. The viscosity ofSIKA Hardener LH at 40 °Cwas determined to be 28.661 ± 0.012 mPa *s at 40.0 ± 0.1 °C which is the mean of two values. Precision of the value is given as standard deviation of all six individual measurements. As the measured RSD was 0.04 %, the validity criterion was met. No observations arousing doubts concerning the accuracy of the results and the validity of the study were made.