Registration Dossier

Physical & Chemical properties

Viscosity

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January 2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
This study was considered as reliable with restrictions because it was not conducted under GLP and there are some lack of details in the study report.
Reason / purpose:
reference to other study
Reason / purpose:
reference to same study
Qualifier:
according to
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:
8.9
Remarks on result:
other: shear rate = 583 s-1
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
4.5
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)
 349.4  8.8
 583.1  8.9
 971.6  7.7
 1610  7.5

The results obtained at 40°C were the following:

Viscosities of the test item at 40°C:

Shear rate (1/s)  Viscosity (mPa.s)
 349.4 5.1
 583.1  4.5
 971.6  4.3
 1610  4.3

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  9.0 mPa.s  8.8 mPa.s  8.8 mPa.s
 40°C  4.5 mPa.s  4.4 mPa.s  4.5 mPa.s
Conclusions:
The dynamic viscosity of the test item at 20°C and 40°C ranged between 4.3 to 8.9 mPa.s at a shear rate from 349 to 1610 s-1.
The test item was considered to be a Newtonian fluid.

The dynamic viscosity of nerol was determined to be:
- 8.9 mPa.s at 20°C ± 0.2°C at constant shear rate of 583 s-1,
- 4.5 mPa.s at 40°C ± 0.1°C at constant shear rate of 583 s-1.
Executive summary:

The determination of the viscosity was performed in accordance with OECD Guideline No 114 “Viscosity of liquids” (October 2012) 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 4.3 to 8.9 mPa.s at shear rates from 349 to 1610 s-1.

The test item was considered to be a Newtonian fluid.

The dynamic viscosity of nerol was determined to be:

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

- 4.5 mPa.s at 40°C ± 0.1°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 nerol at a constant shear rate of 583 s-1 is 8.9 mPa.s at 20°C and 4.5 mPa.s at 40°C.

Key value for chemical safety assessment

Viscosity:
8.9 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.

A supporting study with a consistent result confirms the key study value.