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Physical & Chemical properties

Viscosity

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Endpoint:
viscosity
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Data comes from an online compilation using secondary data sources. There is no experimental study reference, however data is cited in the database as peer reviewed, but as only a qualitative assessment is provided, no reliability was assigned.
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Principles of method if other than guideline:
No data.
Remarks on result:
not measured/tested

The substance is described as a colourless, mobile liquid.

Conclusions:
Low viscosity anticipated.
Executive summary:

The HSDB database provides, as secondary source, some physico-chemical properties. No viscosity value is cited, but the substance cineole is described as a mobile liquid.

Endpoint:
viscosity
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Data comes from an online compilation using secondary data sources. There is no experimental study reference, however data is cited in the database as peer reviewed, but as only a qualitative assessment is provided, no reliability was assigned.
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Principles of method if other than guideline:
No data.
Remarks on result:
not measured/tested

The substance is described as a colourless, mobile liquid.

Conclusions:
Low viscosity anticipated.
Executive summary:

The HSDB database provides, as secondary source, some physico-chemical properties. No viscosity value is cited, but the substance alpha-pinene is described as a mobile liquid.

Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study has been conducted according to internationally recognised guideline. No deviation is reported. The substance is adequately caracterised. Therefore full validation applies.
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Version / remarks:
(2012)
GLP compliance:
no
Type of method:
forced ball viscometer (dynamic)
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
2.46
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
1.63
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
1.79
Remarks on result:
other:
Remarks:
calculated

Results of the single determinations with the respective error as well as the mean value and its standard deviation are presented in the following tables:

Results of all Determinations at 20°C

 

Experiment 1

Experiment 2

Mean

Determination

Viscosity in mPa*s

Viscosity in mPa*s

Viscosity in mPa*s

1

2.4545

2.4576

 

2

2.4536

2.4596

 

3

2.4582

2.4531

 

Mean

2.4554

2.4568

2.456

SD

0.0024

0.0033

0.001

RSD

0.10%

0.14%

0.04%

 

Results of all Determinations at 40°C

 

Experiment 1

Experiment 2

Mean

Determination

Viscosity in mPa*s

Viscosity in mPa*s

Viscosity in mPa*s

1

1.6284

1.6293

 

2

1.6279

1.6249

 

3

1.6288

1.6249

 

Mean

1.6284

1.6263

1.627

sd

0.0005

0.0026

0.001

RSD

0.03%

0.16%

0.09%

 

Detailed findings for duplicate determinations at both temperatures are provided in the experimental report.

Conclusions:
Very fluid liquid.
Potential for Aspiration Hazard.
Executive summary:

The dynamic viscosity of the test substance was measured according to OECD 114/ISO 12058-1 guideline, falling ball method. Six determinations were performed at each temperature, and the mean result was retained, respectively 2.456 mPa.s at 20°C, and 1.627 mPa.s at 40°C.

Endpoint:
viscosity
Type of information:
not specified
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
Data comes from an online compilation using secondary data sources. There is no experimental study reference, however data is cited in the database as peer reviewed, but as only a qualitative assessment is provided, no reliability was assigned.
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Principles of method if other than guideline:
No data.
Remarks on result:
not measured/tested

The substance is described as a colourless mobile liquid.

Conclusions:
Low viscosity anticipated.
Executive summary:

The HSDB database provides, as secondary source, some physico-chemical properties. No viscosity value is cited, but the substance limonene is described as a mobile liquid.

Description of key information

Very fluid liquid. Expected to be similar for both qualities.

Potential for Aspiration Hazard (ca 1.8 mm2/s at 40°C).

Key value for chemical safety assessment

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

Additional information

A fully reliable experimental study, conducted according to a recognized EC method and under GLP, is available for the crude quality. It is therefore considered as a key study. The result is retained as key data for purpose of CSA.

Litterature data describes the three major components (cineole, limonene and alpha-pinene) as mobile liquids, and no new reaction between components is anticipated (similar qualitative composition, the main difference being the proportion change between cineol and alpha-pinene). Therefore, no significant difference is anticipated for the rectified quality.

According to Regulation (EC) No.1272/2008 criteria, the derived kinematic viscosity at 40°C is below the threshold value of 20.5 mm2/s, therefore the substance as potential for classification with Aspiration Hazard (H304).