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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From October 18, 2017 to February 13, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
no
Remarks:
The study was conducted in a facility which operates in accordance with Good Laboratory Practice principles; however no claim of GLP compliance was intended nor is made for this study
Type of method:
ring method
Key result
Surface tension:
ca. 73 mN/m
Temp.:
20.4 °C
Conc.:
1 g/L

Results

The readings, times and temperatures for the sample solution is shown in the following table:

Age of Solution (min)

Reading (mN/m)

Temperature (°C)

130

73.0

20.4

135

73.0

20.4

139

73.0

20.4

Overall result : 73.0 ± 0.5mN/m                       

pH of Sample: 5.4
Overall temperature
: 20.0 ± 0.5ºC

Discussion

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.

Conclusion

The surface tension at nominally 1 g/L of test substance in water has been determined to be73.0 ± 0.5mN/m at20.0 ± 0.5ºC. The test substance was considered not to be surface-active.

Conclusions:
Under the study conditions, the surface tension of the test substance was determined to be 73.0 mN/m at 20ºC.
Executive summary:

A study was conducted to determine the surface tension of the test substance using the ring method, according to OECD Guideline 115 and EU Method A.5. Under the conditions of the study, the surface tension at nominally 1 g/L of test substance in water has been determined to be 73.0 ± 0.5 mN/m at 20.0 ± 0.5ºC. The test substance was therefore considered not to be surface-active (Envigo, 2018).

Description of key information

The surface tension of the test substance was determined using the ring method according to OECD Guideline 115 (Envigo, 2018).

Key value for chemical safety assessment

Surface tension:
73
in mN/m at 20°C and concentration in mg/L:
20

Additional information

(not surface active)

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