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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:
March 2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
Study performed according to international guidelines but not under GLP and with some lack of details.
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
not specified
GLP compliance:
no
Type of method:
rotational viscometer (dynamic)
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
72.1
Remarks on result:
other: shear rate = 583 s-1
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
17.2
Remarks on result:
other: shear rate = 583 s-1

Measured values at different shear rate

The results obtained at 20°C were the following:

Viscosities of the test item measured at 20°C:

Shear rate (1/s)  Viscosity (mPa.s)
 245  71.7
 349.4  71.6
 583.1  72.1
 971.6  72.1

The results obtained at 40°C were the following:

Viscosities of the test item at 40°C:

Shear rate (1/s)  Viscosity (mPa.s)
 583.1 17.2
 971.6  17.2
 1610  17.3
 2705  17.4

The viscosity was constant at all shear rates at both temperatures. The test item was thus considered to be a Newtonian fluid.

Measured values at a constant shear rate

Determination of the viscosity of the test item at a constant shear rate of 583.1 s-1

 Temperature  Viscosity (1st measurement)  Viscosity (2nd measurement)  Viscosity (3rd measurement)
 20°C  72.1 mPa.s  72.1 mPa.s  72.1 mPa.s
 40°C  17.2 mPa.s  17.2 mPa.s  17.2 mPa.s
Conclusions:
The dynamic viscosity of the test item at 20°C and 40°C ranged between 17.2 to 72.1 mPa.s at a shear rate from 245 to 2705 s-1.
The test item was considered to be a Newtonian fluid.

The dynamic viscosity of α-3,3-TRIMETHYLCYCLOHEXANEMETHANOL MULTICONSTITUENTt was determined to be:
- 72.1 mPa.s at 20°C ± 0.2°C at constant shear rate of 583 s-1,
- 17.2 mPa.s at 40°C ± 1°C at constant shear rate of 583 s-1.

α-3,3-TRIMETHYLCYCLOHEXANEMETHANOL MULTICONSTITUENT is classified for aspiration toxicity Category 1 according to Regulation (EC) No 1272/2008 (CLP) criteria (hydrocarbon with a kinematic viscosity of less than 20.5 mm2/s at 40°C): may be fatal if swallowed and enters airways.
Executive summary:

The determination of the viscosity was performed in accordance with OECD Guideline No 114 and with Analytical Method DRT 5230 “Determination of dynamic viscosity with a rotary viscometer Haake VT550 or Rheolab QC”.

 

The dynamic viscosity of the test item at 20°C and 40°C ranged between 17.2 to 72.1 mPa.s at shear rates from 245 to 2705 s-1.

The test item was considered to be a Newtonian fluid.

The dynamic viscosity of α-3,3-TRIMETHYLCYCLOHEXANEMETHANOL MULTICONSTITUENT was determined to be:

- 72.1 mPa.s at 20.0°C ± 0.2°C at a constant shear rate of 583 s-1,

- 17.2 mPa.s at 40°C ± 1°C at a constant shear rate of 583 s-1.

Description of key information

The dynamic viscosity was determined with a rotational viscometer.
The substance is a Newtonian fluid.

The dynamic viscosity of α-3,3-TRIMETHYLCYCLOHEXANEMETHANOL MULTICONSTITUENT at a constant shear rate of 583 s-1 is 72.1 mPa.s at 20.0°C ± 0.2°C and 17.2 mPa.s at 40°C± 1°C.

Key value for chemical safety assessment

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

Additional information

Key study conducted according to OECD 114 guideline. The result is scientifically acceptable but not obtained under GLP. Therefore a reliability of 2 (reliable with restrictions) was assigned.