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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:
From June 14, 1999 to June 14, 1999
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes
Type of method:
ring method
Surface tension:
58.7 mN/m
Temp.:
20 °C
Conc.:
1 000 mg/L
Remarks on result:
other: The final value obtained after correction with respect to the table given in the directive A.5 (Harkins-Jordan correction).

Results:

Six measurements at a temperature of 20°C, every 5 min, were done:

Measurement

1

2

3

4

5

6

Time (min)

0

5

10

15

20

25

Surface tension (mN/m)

59.4

59.5

59.2

59.2

59.2

59.2

 

The mean value, multiplied by the calibration factor (1.0064) yields: Surface tension= 59.66 mN/m

After correction with respect to the table given in the directive A.5 (Harkins-Jordan correction), the final value for the surface tension at 20°C is: 58.7 mN/m.

 

Calibration:

- The calibration of the apparatus was carried out using distilled water. The surface tension was determined to be: 72.12 mN/m

- The calibration factor F was calculated with respect to the literature value for water. The value of the calibration factor was 1.0064.

 

Conclusions:
Under the study conditions, the surface tension of an aqueous solution of the test substance at 20°C was 58.7 mN/m.
Executive summary:

A study was conducted to determine the surface tension of the test substance according to EU Method A.5, in compliance with GLP.

An aqueous solution of the test substance with a concentration of 1.0 g/L was prepared at ambient temperature. Six measurements at a temperature of 20°C, every 5 min, were carried out with the test substance. Before the measurement a calibration of the apparatus was performed. The calibration of the apparatus was carried out using distilled water.

Under the study conditions, the surface tension of an aqueous solution of the test substance at 20°C was 58.7 mN/m.

Description of key information

The surface tension of an aqueous solution of the test substance at 20°C was 58.7 mN/m (Smeykal, 1999).

Key value for chemical safety assessment

Surface tension:
58.7
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information