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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:
From 2012-11-23 to 2012-11-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to a method recommended in international standards. No deviation was reported. The substance is considered to be adequately characterised with its purity. Therefore full validation applies.
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Qualifier:
according to
Guideline:
other: ISO 304
Version / remarks:
1985
GLP compliance:
yes (incl. certificate)
Remarks:
Inspected on 10 July 2012 / Signed on 30 November 2012
Type of method:
ring method
Specific details on test material used for the study:
Storage conditions: room temperature in the dark
Key result
Surface tension:
64.7 mN/m
Temp.:
21 °C
Remarks on result:
other: expected 90% saturated solution

Water (calibration)

Temperature = 21.0-21.2°C

Sample 1: calibration factor = 1.001 (mean of 6 measurements)

Sample 2: calibration factor = 1.001 (mean of 8 measurements)

Test item

Temperature = 21.0 ± 0.5 ºC

Sample 1: 63.3 mN/m (mean of 5 measurements) = 63.4 mN/m corrected; pH = 4.7

Sample 2: 65.8 mN/m (mean of 6 measurements) = 65.9 mN/m corrected; pH = 5.3

Mean sample result = 64.7 ± 2.0 mN/m

Conclusions:
According to EU A5 criteria, as the result is above the threshold value of 60 mN/m, the substance is NOT considered to have surface-active potential under the experimental conditions.
Executive summary:

The surface tension of the test substance was measured under GLP according to OECD 115/EU A5 guidelines, ring method, at expected 90% of the saturation solubility.

Two replicates were performed, and the mean value was corrected with calibration factor from water.

The surface tension of the test substance is 64.7 mN/m, at ca 9.2 mg/L and 21°C.

Description of key information

Surface tension = 64.7 mN/m, at 90% saturation expected (i.e. ca 9.2 mg/L), and 21°C.

According to EU A5 criteria, as the result is above the threshold value of 60 mN/m, the substance is NOT considered to have surface-active potential under the experimental conditions.

Key value for chemical safety assessment

Surface tension:
64.7

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EU/ISO method and under GLP, is available. It is considered as a key study, and the result is retained as key value.

Concentration is not specified as actual concentration was not measured.