Registration Dossier

Diss Factsheets

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
22 June 2016 to 23 June 2016
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)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Key result
Surface tension:
63.9 mN/m
Temp.:
20 °C
Conc.:
90 vol%

Results

- In order to describe the time dependence of the surface tension after transferring the solution to the measurement vessel, repeated measurements were carried out with increasing the equilibrium time. A constant surface tension was reached after about 360 sec (see Table 1).

- The surface tension of the test material aqueous solution read on the instrument was 64.5 mN/m at 20 °C using the ring method representing the mean of five separate measurements. The details are shown in Table 2.

- The measured surface tension was multiplied by φa and Harkins-Jordan correction factor resulting in a corrected surface tension of 63.9 mN/m.

- As the surface tension value was higher than 60 mN/m, the test material is not classified as surface active.

Table 1: Time dependence of the surface tension after transferring the solution to the measurement vessel

Surface tension (mN/m)

Equilibrium time (sec)

59.0

300

64.5

360

64.5

420

64.5

480

64.5

520

Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

 

Table 2: Measured surface tension values and equilibrium times

Surface tension (mN/m)

Equilibrium time (sec)

64.5

360

64.7

360

64.5

360

64.5

360

64.5

360

Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

Conclusions:
Under the conditions of this study the surface tension of the test material was found to be 63.9 mN/m. As the surface tension value was higher than 60 mN/m, the test material is not classified as surface active.
Executive summary:

The surface tension of the test material was investigated in accordance with the standardised guidelines OECD 115 and EU Method A.5 under GLP conditions, using the ring method.

In order to describe the time dependence of the surface tension after transferring the solution to the measurement vessel, repeated measurements were carried out with increasing the equilibrium time. A constant surface tension was reached after about 360 sec. The surface tension of the test material aqueous solution read on the instrument was 64.5 mN/m at 20 °C using the ring method representing the mean of five separate measurements. The measured surface tension was multiplied by φa and Harkins-Jordan correction factor resulting in a corrected surface tension of 63.9 mN/m.

Under the conditions of this study the surface tension of the test material was found to be 63.9 mN/m.

As the surface tension value was higher than 60 mN/m, the test material is not classified as surface active.

Description of key information

Under the conditions of this study the surface tension of the test material was found to be 63.9 mN/m. As the surface tension value was higher than 60 mN/m, the test material is not classified as surface active.

Key value for chemical safety assessment

Surface tension:
63.9

Additional information

The surface tension of the test material was investigated in accordance with the standardised guidelines OECD 115 and EU Method A.5 under GLP conditions, using the ring method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

In order to describe the time dependence of the surface tension after transferring the solution to the measurement vessel, repeated measurements were carried out with increasing the equilibrium time. A constant surface tension was reached after about 360 sec. The surface tension of the test material aqueous solution read on the instrument was 64.5 mN/m at 20 °C using the ring method representing the mean of five separate measurements. The measured surface tension was multiplied by φa and Harkins-Jordan correction factor resulting in a corrected surface tension of 63.9 mN/m.

Under the conditions of this study the surface tension of the test material was found to be 63.9 mN/m.

As the surface tension value was higher than 60 mN/m, the test material is not classified as surface active.

Categories Display