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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:
30-09-2008 to 02-10-2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study performed under GLP. All relevant validity criteria were met.
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
inspected: Novermber 2007; signature: April 2008
Type of method:
ring method
Surface tension:
59.4 mN/m
Temp.:
20 °C
Conc.:
90 vol%
Remarks on result:
other: mean determined surface tension, multiplied by Φb (calibration factor) and with Harkins-Jordan correction

Table 2.0 – Determination of the surface tension of the test item

Time expired

(hours/minutes)

Temperature

(°C)

Surface Tension (mN/m)

 

 

Measured

Mean value

Mean value corrected for calibration

Corrected for Harkins-Jordan

First Sample

 

 

 

 

 

00:33

20.2

58.6

58.18

60.03

59.14

00:34

20.2

58.3

00:35

20.2

58.2

00:36

20.2

58.0

00:37

20.2

58.0

00:38

20.2

58.0

 

 

 

 

 

 

Second sample

 

 

 

 

 

00:33

20.1

59.2

59.07

60.94

60.15

00:34

20.1

59.1

00:35

20.1

59.1

00:36

20.1

59.0

00:37

20.1

59.0

00:38

20.1

59.0

 

 

 

 

 

 

Mean from both samples: Surface Tension: 59.6 mN/m

Conclusions:
The surface tension of a test solution at 90% saturation in water has been determined to be 59.6 mN/m at 20.0 ± 0.5 °C. The substance is considered to be surface-active.
Executive summary:

The surface tension was determined using the ring method of EU Method A.5 and OECD 115 under GLP. Substances showing a surface tension lower than 60 mN/m under the conditions of this method, should be regarded as being surface active. The surface tension of a test solution at 90% of the test item saturation solubility in water has been determined to be 59.6 mN/m at 20.0 ± 0.5 °C. The substance is considered to be a surface-active.

Description of key information

Surface Tension: 59.6 mN/m at 20.0 ± 0.5 °C in 90% saturated solution, EU Method A.5, 2008

Key value for chemical safety assessment

Additional information

Key study : EU Method A.5, 2008 : The surface tension was determined using the ring method of EU Method A.5 and OECD 115 under GLP. Substances showing a surface tension lower than 60 mN/m under the conditions of this method, should be regarded as being surface active. The surface tension of a test solution at 90% of the test item saturation solubility in water has been determined to be 59.6 mN/m at 20.0 ± 0.5 °C. The substance is considered to be a surface-active.