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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:
28 May 2010- 5 August 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
This study has been performed according to OECD and EC guidelines and according to GLP principles. The test substance is adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
OECD harmonised ring method
Key result
Surface tension:
75.3 mN/m
Temp.:
20 °C
Conc.:
1 g/L

The water calibration factor was calculated to be 1.03.

The mean of five consistent measurements was 73.1 mN/m (before correction).

Conclusions:
In the experimental conditions, the test substance is NOT considered to be surface active.
Executive summary:

The surface tension of diluminium chloride pentahydroxide was measured according to OECD 115/EU A5 guidelines, ring method.

The mean of five consecutive consistent measurements, at the maximum testing concentration of 1 g/L in double-distilled water and 20°C, was corrected with calibration factor from water and according to Harkins-Jordan table.

The final retained result is 75.3 mN/m.

Description of key information

Dialuminium chloride pentahydroxide is NOT considered as surface-active.

Key value for chemical safety assessment

Surface tension:
75.3
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. Therefore, it is considered as a key study, and the result is retained as key data.

Furthermore, inorganic substances are generally known to have no impact or slightly increase the surface tension of water.