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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:
From 12 June to 18 July 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well conducted and well described study according to GLP and OECD guideline 114 without any deviation.
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 192,2005
Qualifier:
according to
Guideline:
other: DIN EN ISO 3219
GLP compliance:
yes (incl. certificate)
Type of method:
rotational viscometer (dynamic)
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
ca. 69.5
Remarks on result:
other: at a constant shear rate of 500s-1
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
ca. 20.6
Remarks on result:
other: at a constant shear rate of 500s-1

The viscosity of an oil standard was determined using a rotary viscometer (identical method as for the test item). The viscosity of the standard was determined to be 139 mPa.s at 20°C + 0.2°C (reference value 134 mPa.s) and 46.0 mPa. s at 40°C + 0.2°C (reference value 45.2 mPa.s)

The results:

The dynamic viscosity of the test item at 20°C + 0.2°C ranged between 72 and 104 mPa.s at a shear rate from 20 to 100 s-1.

The test item was considered to be a Newtonian fluid.

Table of results at 20°C and 40°C:

Viscosity at 20°C                                                  Viscosity at 40°C

 Shear rate [s-1]  First measurement [mPa*s]  Second measurement [mPa*s]  Third measurement  [mPa*s]   First measurement [mPa*s]   Second measurement [mPa*s]  Third measurement  [mPa*s] 

 500

69.82

69.09 

 69.17

20.39 

 20.68

20.47 

 500

69.96

 69.31

 69.17

20.47

 20.61

20.47 

  500

 69.96

69.31 

69.09 

20.47 

20.61 

20.47 

  500

 69.96

69.31 

69.09 

 20.47

20.61 

20.47 

  500

 69.96

69.17 

69.17 

20.54 

 20.68

20.54 

  500

 69.96

69.24 

69.24 

20.54 

20.68 

20.61 

  500

 69.96

69.31 

69.24 

20.61 

20.61 

20.61 

  500

70.04

69.24 

69.24 

20.54 

20.61 

20.61 

  500

69.96

69.24 

69.17 

20.54 

20.61 

20.54 

  500

 69.96

 69.31

69.17

20.54 

20.61 

20.47 

 mean (n=10)

 69.95

 69.25

 69.18

 20.51

20.63

20.53 

 SD (n=10 )

 0.05

 0.07

 0.06

0.06 

 0.03  0.06

 mean (n=3) 69.46        

SD (n=3) 0.43

mean (n=3)  20.56        

SD (n=3) 0.06

Conclusions:
The dynamic viscosity of the test item at 20°C +/- 0.2°C ranged between 72 and 104 mPa.s at a shear rate from 20 to 100 s-1.
The dynamic viscosity of the test item was determined to be: - 69.5 mPa s at 20°C +/- 0.2°C, and 20.6 mPa s at 40°C +/- 0.1°C (constant shear rate of 500 s-1).

The test item was considered to be a Newtonian fluid.
Executive summary:

A GLP study was conducted to determine the viscosity of the test item by a rotatory viscometer method according to OECD guideline 114, CIPAC MT 192 and DIN EN ISO 3219.

The dynamic viscosity of the test item at 20°C +/- 0.2°C ranged between 72 and 104 mPa.s at a shear rate from 20 to 100 s-1.

The dynamic viscosity of the test item was determined to be 69.5 mPa.s at 20°C +/- 0.2°C and 20.6 mPa.s at 40°C +/- 0.1°C at a constant shear rate of 500 s-1.

This study was reliable without restriction.

Description of key information

The dynamic viscosity of the test item was determined to be 69.5 mPa s at 20°C +/- 0.2°C and 20.6 mPa s at 40°C +/- 0.1°C at a constant shear rate of 500 s-1. 

Key value for chemical safety assessment

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

Additional information

Key study conducted according to OECD 114 guideline under GLP without deviation and with certificate of analysis included.

Therefore a reliability of 1 is assigned and the result of the key study can be used as end-point value.