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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: According to standard test method, but no GLP lab
Justification for type of information:
A discussion and report on the read across strategy is given as an attachment in IUCLID Section 13.
Reason / purpose for cross-reference:
read-across: supporting information
Qualifier:
according to guideline
Guideline:
other: Wilhelmy plate
Deviations:
not specified
Principles of method if other than guideline:
The Wilhelmy plate consists of a thin plate usually on the order of a few centimeters square. The plate is often made from glass or platinum which may be roughened to ensure complete wetting. The plate is cleaned thoroughly and attached to a scale or balance via a thin metal wire. The force on the plate due to wetting is measured via a tensiometer or microbalance and used to calculate the surface tension (σ) using the Wilhelmy equation.
GLP compliance:
no
Remarks:
No GLP lab
Type of method:
plate method
Key result
Surface tension:
18.2 mN/m
Temp.:
25 °C
Conc.:
100 vol%
Conclusions:
Under the conditions of this study a surface tension of 18.2 mN/m at 25°C was determined for the test substance Hydrocarbons, C6, isoalkanes, <5% n-hexane
Executive summary:

Under the conditions of this study a surface tension of 18.2 mN/m at 25°C was determined for the test substance Hydrocarbons, C6, isoalkanes,

Description of key information

A surface tension study on 2,2 -dimethylbutane does not need to be conducted because based on structure, surface activity is not expected or cannot be predicted.

There is no data available for 2,2 -dimethylbutane. Data is available for Hydrocarbons, C6, isoalkanes, <5% n-hexane and Isohexane and this data is used for read across to 2,2 -dimethylbutane.

The surface tension of Hydrocarbons, C6, isoalkanes, <5% n-hexane is between 16 and 20 mN/m at 25°C according Wilhelmy plate method.

Key value for chemical safety assessment

Additional information