Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 November 2017 to 13 August 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid

Results and discussion

Surface tension
Key result
Surface tension:
51.2 mN/m
Temp.:
20.1 °C
Conc.:
1 g/L

Any other information on results incl. tables

Verification with distilled water:

 Temperature (°C)  20.3
Time   Surface tension (mN/m)
After 22 s   70.99
After 82 s  70.98
 After 145 s  70.98
Mean result   71.0

Measurements on the test item diluted at 1 g/L in distilled water:

 Assay N°  3  Assay N°  4  Assay N°  5

Temperature

(°C)

 20.2 Temperature (°C)  20.2  Temperature (°C) 20.0 
Time    Surface tension (mN/m) Time    Surface tension (mN/m) Time   Surface tension (mN/m)
After 144 s  51.06  After 145 s  53.27 After 636 s  50.44
After 206 s 51.35  After 206 s   52.35 After 698 s  50.59 
After 268 s  51.52  After 268 s  51.59  After 759 s 50.74
After 329 s  51.62 After 330 s 51.10   After 821 s 50.85 
After 391 s 51.72  After 391 s  51.05  After 883 s   50.95
After 453 s

51.81

 After 453 s

 51.20

After 945 s

 51.04

 Mean result

 51.7

 Mean result

 51.1

 Mean result

 50.9

Remark: Two assays were performed and were not taken into account; the results were not stable and not reliable.

Applicant's summary and conclusion

Conclusions:
The mean surface tension of the test item at 1g/L in distilled water at 20.1 °C was 51.2 mN/m. The test item was considered as surface-active in the experimental conditions used.