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Diss Factsheets

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:
27-02-2001 to 28-06-2001
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:
other: ISO 304
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
inspected: February 2000 ; signature: April 2000
Type of method:
ring method
Surface tension:
68.2 mN/m
Temp.:
21 °C
Conc.:
9.18 mg/L
Remarks on result:
other: mean determined surface tension, multiplied by Φb (calibration factor) ; without Harkins-Jordan correction (not required for technical reasons: apparatus gave direct reading for surface tension within the method required accuracy due to ring dimensions)

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

Time expired

(minutes)

Temperature

(°C)

Surface Tension (mN/m)

 

 

Measured

Mean value

Mean value corrected for calibration

Corrected for Harkins-Jordan

 

 

 

 

 

90

21

58.6

68.5

68.2

not applicable

100

21

67.5

110

21

68.5

120

21

68.5

130

21

68.5

140

21

68.5

150 

21 

68.5 

 

 

 

Mean Surface Tension: 68.2 mN/m

Conclusions:
The surface tension of a test solution at ca. 90% saturation in water (or 9.18 mg/L) has been determined to be 68.2 mN/m at 20.0 ± 0.5 °C. The substance is considered not to be surface-active.
Executive summary:

The surface tension was determined using the ring method of EU Method A.5 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 (9.1 mg/L determined by GC-FID) has been determined to be 68.2 mN/m at 21.0 ± 0.5 °C. The substance is not considered to be a surface-active.

Description of key information

Surface Tension: 68.2 mN/m at 21.0 ± 0.5 °C in ca. 90% saturated solution (or 9.18 mg/L), EU Method A.5, 2001

Key value for chemical safety assessment

Surface tension:
68.2
in mN/m at 20°C and concentration in mg/L:
9.18

Additional information

Key study : EU Method A.5, 2001 : The surface tension was determined using the ring method of EU Method A.5 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 ca. 90% of the test item saturation solubility in water (9.18 mg/L determined by GC-FID) has been determined to be 68.2 mN/m at 21.0 ± 0.5 °C. The substance is not considered to be a surface-active.