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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
30 July 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study conducted according to OECD 114 guideline, under GLP without deviation and with certificate of analysis included.
Reason / purpose:
reference to other study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
2015-03-05
Type of method:
rotational viscometer (dynamic)
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 1.5
Remarks on result:
other: shear rate = 264 s-1
Remarks:
First determination. This value is the mean of 2 measurements.
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 1.5
Remarks on result:
other: shear rate = 264 s-1
Remarks:
First determination. This value is the mean of 2 measurements.
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 1.5
Remarks on result:
other: shear rate = 264 s-1
Remarks:
Second determination. This value is the mean of 2 measurements.
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 1.5
Remarks on result:
other: shear rate = 264 s-1
Remarks:
Second determination. This value is the mean of 2 measurements.
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 1.5
Remarks on result:
other: shear rate = 264 s-1
Remarks:
Final value
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 1.5
Remarks on result:
other: shear rate = 264 s-1
Remarks:
Final value

Results:

Results of the pre-test:

 Temperature

(°C)

Speed

(RPM*) 

  Torque (%)  Shear rate (s-1)   Time (sec) 

 Dynamic Viscosity

(mPa.s)

 19.9 120  4.2 158.4  120  1.05 
20.0  150  5.3 198.0  240  1.06
20.0  180  6.4 237.6  360  1.07
19.9  200  7.1 264.0  480  1.06

*RPM: Rotation Per Minute

As the torque value is below 10% and consequently the dynamic viscosity is below 1.5 mPa.s, the uncertainty on these measurements is not known. However these results can still used to estimate the fluid behaviour.

The test item is considered as Newtonian because the difference between the lowest and the highest value is 1.9%. As a reminder, a fluid is considered as Newtonian if the difference between the lowest and the highest value is fewer than 3%.

Main test:

First determination:

  Results of the first determination
 Temperature (°C) Speed (RPM)  Torque (%)  Shear rate (s-1)  Viscosity (mPa.s) 
 20.0 200 7.3 264  1.09
19.9  200  7.2 264  1.08
40.1  200  5.8 264  0.87
40.1  200  5.8  264  0.87

For both 20.0 +/- 0.1°C and 40.1 +/- 0.1°C, dynamic viscosities values are below 1.5 mPa.s.

Second determination:

  Results of the second determination

 Temperature (°C) Speed (RPM)  Torque (%)  Shear rate (s-1)  Viscosity (mPa.s) 
 20.0 200  7.2 264  1.08 
20.0  200  7.2 264  1.08 
40.0 200  5.9  264  0.88 

40.0

200  5.9  264  0.88

 As for the first determination, dynamic viscosities values are below 1.5 mPa.s.

Conclusions:
According to OECD 114 Guideline, the viscosity estimated for the test item is <1.5 mPa.s at 20°C and 40°C at the shear rate 264s-1.
Executive summary:

A study was performed to determine the viscosity of the test item REACTION MASS OF BETA-PHELLANDRENE AND D-LIMONENE AND L-LIMONENE. The method followed was designed to be compliant with the OECD Guideline for Testing of Chemicals No. 114, ''Viscosity of Liquids".

In this method, the measurement is performed under different shear conditions.

A rotational viscometer measures the mechanical resistance of a fluid that work opposite the rotational movement of a spindle. A spindle is therefore immersed into the fluid and a rotation is applied through a calibrated spring. The resistance exerted on the spindle is estimated by the spring twist. The spindle shear rate, the spindle size and shape, the fluid container and the full scale of the spring torque determine the measuring range. Under the study conditions, values of viscosity between 1.5 and 300000 mPa.s can be measured.

This technique allows measuring the dynamic viscosity of Newtonian liquids (for which the viscosity does not depend on shear rate or time) and non-Newtonian liquids (for which the viscosity depends on shear rate or time).

A pre-test was firstly performed and allowed classifying the test item as a newtonian liquid.

Two determinations were then performed. Each determination includes two measurements at 20 +/- 0.1°C and two measurements at 40 +/- 0.1°C. Dynamic viscosities obtained during these determinations have all been below 1.5 mPa.s. Considering the expression of results from the sudy plan, dynamic viscosities of the test item are expressed as follows:

n (20.0°C +/- 0.1, 264s-1) < 1.5 mPa.s

n (40.0°C +/- 0.1, 264s-1) < 1.5 mPa.s

Description of key information

The dynamic viscosity of Reaction mass of beta-phellandrene and d-limonene and l-limonene was determined to be <1.5 mPa.s at 20°C and 40°C at the shear rate 264 s-1.

Key value for chemical safety assessment

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

Additional information

The test item was considered to be a Newtonian fluid.

Therefore, dipentene multiconstituent is classified for aspiration toxicity Category 1 (may be fatal if swallowed and enters airways) according to Regulation (EC) No 1272/2008 (CLP) and harmful (R65: may cause lung damage if swallowed) according to Directive 67/548/EEC.