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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Viscosity

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Administrative data

Link to relevant study record(s)

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Endpoint:
viscosity
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Read across study
Justification for type of information:
The study with the read across substance is considered sufficient to fulfil the information requirements.
Reason / purpose for cross-reference:
read-across source
Qualifier:
no guideline available
Principles of method if other than guideline:
Handbook
GLP compliance:
not specified
Type of method:
other: Handbook
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
ca. 0.837
Conclusions:
Under the study conditions, the viscosity of the test substance was established at 0.837 mPa·s at 20°C.
Executive summary:

A study was conducted to determine the viscosity of the read across substance, vinyl toluene. The measured value was obtained from a reliable literature source, the Encyclopedia of Chemical Technology. Under the study conditions, the viscosity of the test substance was established at 0.837 mPa·s at 20°C (Kirk-Othmer, 1997).

Endpoint:
viscosity
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
The substance falls within the applicability domain of the selected (Q)SAR method.
Qualifier:
according to guideline
Guideline:
other: T.E.S.T. (v 4.2)
GLP compliance:
no
Key result
Temp.:
other: 25°C
Parameter:
dynamic viscosity (in mPa s)
Value:
0.9

Individual predicitons

Method

Predicted value Log10 (cP)

Hierarchical clustering

-0.02

Single model

-0.0

Group contribution

N/A

Nearest neighbor

-0.13

Chemicals

Mean absolute error

Entire set

0.13

Similarity coefficient ≥0.5

0.35
Conclusions:
Under the study conditions, the viscosity for the test substance was determined to be 0.90 cP at 25°C.
Executive summary:

A study was conducted to determine the viscosity of the test substance using modelling with the consensus method of the Toxicity Estimation Software Tool (T.E.S.T) of US EPA. The estimated value was a mean of four systemic methods. The test substance was present in the training set and the similarity coefficient indicated a reliable model prediction. Under the study conditions, the derived viscosity for the test substance is determined at 0.90 cP at 25°C (US EPA, 2017).

Description of key information

Determination of the viscosity based on the results for the read across substance, vinyl toluene (Kirk-Othmer, 1997) and by modelling (T.E.S.T. v 4.2) (US EPA, 2017).

Key value for chemical safety assessment

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

Additional information

Read across substance: 0.837 mPa · s (dynamic)

T.E.S.T. modelling: 0.90 cP at 25°C