Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 Jul - 16 Aug 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
adopted in 2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
adopted in 1995
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
Department of Health, London, UK
Type of method:
ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Specific details on test material used for the study:
Storage conditions: room temperature in the dark

Results and discussion

Surface tension
Key result
Surface tension:
ca. 71.5 mN/m
Temp.:
21.8 °C
Conc.:
1 g/L

Any other information on results incl. tables

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

Table 2: Sample 1  

Time

[mins]

Reading

[mN/m]

Temperature

[°C]

68

71.5

21.8

87

71.5

21.8

107

71.5

21.8

126

71.5

21.8

145

71.5

21.8

 

Table 3: Sample 2  

Time

[mins]

Reading

[mN/m]

Temperature

[°C]

78

71.5

21.8

98

71.5

21.8

117

71.5

21.8

135

71.5

21.8

154

71.5

21.8

 

Mean Sample 1 result: 71.5 mN/m     pH of Sample 1: 6.8

Mean Sample 2 result: 71.5 mN/m     pH of Sample 2: 6.9

Mean result: 71.5 mN/m

Overall temperature: 21.8 ± 0.5 °C

 

Discussion

According to criteria mentioned 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 mean surface tension of duplicate solutions prepared at nominally 1 g/L solution of test item in water has been determined to be 71.5 mN/m at 21.8 ± 0.5 °C. The test item was considered not to be surface-active.

Applicant's summary and conclusion