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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:
08 November 2017 to 05 April 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
30 May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
27 July 1995
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: D26-3-3-1
- Expiration date of the lot/batch: 01 December 2018
- Purity test date: 11 April 2017
- Stability under test conditions: Room temperature, in the dark
- Purity: 47.4 %
Key result
Surface tension:
72.4 mN/m
Temp.:
20 °C
Conc.:
1 g/L

The readings, times and temperatures for the sample solutions are shown in the following tables:

Sample 1:

Age of Solution (min)

Reading (mN/m)

Temperature (°C)

78

72.5

20.0

98

72.5

20.0

119

72.5

20.0

140

72.0

20.0

152

72.5

20.0

Sample 2:

Age of Solution (min)

Reading (mN/m)

Temperature (°C)

78

72.5

20.0

95

72.0

20.0

108

72.0

20.0

123

72.5

20.0

144

72.5

20.0

Mean Sample 1 result :

72.4 mN/m

Mean Sample 2 result :

72.3 mN/m

Meanresult                :

72.4 mN/m

Overall temperature   :

20.0 ± 0.5 ºC

pH of Sample 1 :

11.2

pH of Sample 2 :

11.3

Conclusions:
The mean surface tension of duplicate 1.0 g/L solutions of test item in water has been determined to be 72.4 mN/m at 20.0 ± 0.5 °C. The test item was considered not to be surface-active.

Description of key information

The surface tension of the substance was determined in a GLP-compliant study according to test method EU Method A.5 and OECD guideline 115 to be 72.4 mN/m at 20.0 ± 0.5 °C and 1 g/L following the ring method (K1 study, Covance, 2019).

Key value for chemical safety assessment

Surface tension:
72.4
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information