Cyclohexanemethanol, 4-(1-methylethyl)-

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2004

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Justification for type of information:

The study was conducted according to an internationally recognised method. No deviation was reported. Experimental details are missing. Therefore validation applies with acceptable restrictions.

Reason / purpose for cross-reference:

reference to other study

Qualifier:

no guideline followed

Principles of method if other than guideline:

Test method: Automatic viscosity measurement on a sample of around 10 grams, between 120°C to 30°C, on manual mode, using a normalised DIN of REOLOGICA rotary Viscometer.

GLP compliance:

no

Type of method:

rotational viscometer (dynamic)

Temp.:

other: 120.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

1.3

Temp.:

other: 110.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

1.6

Temp.:

other: 100.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

2

Temp.:

other: 90.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

2.6

Temp.:

other: 80.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

3.5

Temp.:

other: 70.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

4.8

Temp.:

other: 60.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

6.9

Temp.:

other: 50.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

10.4

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

16.5

Temp.:

other: 30.0°C

Parameter:

dynamic viscosity (in mPa s)

Value:

28

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

52

Remarks on result:

other:

Remarks:

extrapolated

Calculation method: Regression non-linear of the measured points. The viscosity in function of the temperature is extrapolated by means of the equation as below.

η(T) = 10exp{A+[-B/(t+C)]}

with: A = - 1.94307 ; B = 465.951 ; C = 107.44 ; t = temperature in °C

From this regression, the value as the standard temperature of 20°C can be extrapolated: 52 mPa.s.

Conclusions:

Fluid liquid at ambient temperature (52 mPa.s at 20°C, extrapolated).

Executive summary:

The dynamic viscosity of the test substance was measured with rotational viscometer. Determinations were performed between 120 and 30°C, the regression as a function of temperature was calculated, and the value at the standard temperature of 20°C was extrapolated from the equation.

Viscosity decreases with temperature.

Description of key information

Fluid liquid at ambient temperature (52 mPa.s at 20°C, extrapolated).

 

Key value for chemical safety assessment

Viscosity:

52 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

A reliable experimental study, conducted according to DIN standard, is available. Despite restrictions due to lack of experimental details, it is considered as a key study. Measurements were recorded between 30 and 120°C, and the extrapolated result at 20°C is retained as key data.