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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27/12/2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
The study was conducted according to an internationally recognised guideline. No deviation affected the quality of the study. The substance is adequately defined (with certificate of analysis). Validation applies with restrictions, as no measurement was conducted at 40°C (relevant for AH classification purpose).
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Version / remarks:
(1981)
Deviations:
no
GLP compliance:
no
Type of method:
rotational viscometer (dynamic)
Specific details on test material used for the study:
- Physical state: colorless liquid
- Sample storage: at room temperature, 20°C, under nitrogen atmosphere
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 10
Temp.:
other: 24.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
< 10

Two replicates were performed at 20ºC and 24ºC (room temperature).

The mean viscosity of the test substance was determined below the detection limit of the method (10 cP).

Conclusions:
The viscosity was <10 mPa.s at 20ºC.
This can be considered as a fluid liquid (close to water).
The corresponding kinematic viscosity (ca 10.6 mm2/s) is relevant for classification with aspiration hazard.
Executive summary:

Following OECD 114 guideline (rotational viscometer), the viscosity was <10 mPa.s at 20ºC (below the application range of the method).

Description of key information

Low viscous liquid: <10 mPa.s at 20°C

Key value for chemical safety assessment

Additional information

A reliable study, conducted according to the OECD guideline using a rotational viscometer, is available. Influence of shear rate was not described. It is considered as a key study, but as the result was below the application range of the method, it is therefore expressed as a limit value, and cannot be retained as key data for purpose of CSA.

Despite measurement is not available at 40°C, the low value is considered as a worst-case, and sufficient for classification purpose, regarding aspiration hazard.