Nerol

Viscosity

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 for cross-reference:

reference to other study

Reason / purpose for cross-reference:

reference to same 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:

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.