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Diss Factsheets

Physical & Chemical properties

Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27th January 1993
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Pesticide Assessment Guideline Subdivision D § 63-18
GLP compliance:
yes
Type of method:
rotational viscometer (dynamic)
Key result
Temp.:
other: 25.0°C
Parameter:
other: poise
Value:
11.37

Table 1: Summary of results

 Time (seconds)  Dial reading  Viscosity (poise)
 90  69.0  11.30
 120  69.2  11.35
 180  69.2  11.35
 300  69.3  11.37
Conclusions:
Under the conditions of the test, the viscosity of the test material was determined to be 11.37 poise at 25 ºC.
Executive summary:

In a GLP compliant viscosity study conducted in accordance with methodology similar to standardised guideline OECD 114, the viscosity of the test material was determined using a rotational viscometer (cone-plate). Under the conditions of the test, the viscosity of the substance was determined to be 11.37 poise at 25 ºC.

Description of key information

Viscosity was determined to be 11.37 poise (equivalent to 1137 mPa/s) at 25 ºC; study conducted in accordance with methodology similar to OECD Guideline 114; Tutty (1993)

Key value for chemical safety assessment

Additional information

Two studies were submitted to address the viscosity endpoint. Tutty (1993) was performed in accordance with GLP and to methodology similar to OECD Guideline 114 whereas McKelevie (1992) was performed in line with sound scientific principles but not to GLP. Tutty (1993) was subsequently selected as the key study to address this endpoint.

In a GLP compliant viscosity study conducted in accordance with methodology similar to a standardised guideline, the viscosity of the test material was determined using the rotational viscometer. Under the conditions of the test, the viscosity of the substance was determined to be 11.37 poise (1137 mPa/s) at 25 ºC.