Registration Dossier

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:
2005-12-09 to 2006-01-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
OECD harmonised ring method
Key result
Surface tension:
68.1 mN/m
Temp.:
20 °C
Conc.:
1.036 g/L

The last average value of a measuring cycle represents the determined surface tension. This value contains an automatic correction and thus takes into account the hydrostatically effective liquid volume (weight of the liquid lamella hanging under the ring). The age of the tested solution (time span from preparation to measurement) was 1 to 396 min. 110 min. and 161 min. for the measurements. After pouring the solution into the measuring vessel, the respective final value was reached after approx. 7 - 11 minutes.

Conclusions:
The surface tension of a 1 g/L test solution was determined to be 68.1 mN/m. Thus, the substance is not surface active.
Executive summary:

A study was conducted according to OECD TG 115, Regulation (EC) No 440/2005 Part A, A.5, to determine the surface tension of an aqueous solution of the test item using the ring method. Therefore, a saturated solution of the test substance in ultrapure water was prepared in by adding 1 g of the test substance to 1 L of ultrapure water. The clear solution was transferred to the measuring vessel. The solution allowed stabilising at the test temperature (20°C). The surface tension was determined to be 68.1 mN/m at 20 °C. It was concluded that the test item is not surface active (surface tension > 60 mN/m).

Description of key information

The surface tension was determined to be 68.1 mN/m at 20 °C. It was concluded that the test item is not surface active (surface tension > 60 mN/m) (reference 4.10 -1).

Key value for chemical safety assessment

Surface tension:
68.1
in mN/m at 20°C and concentration in mg/L:
1 036.4

Additional information

A study was conducted according to OECD TG 115, Regulation (EC) No 440/2005 Part A, A.5, to determine the surface tension of an aqueous solution of the test item using the ring method. Therefore a saturated solution of the test substance in ultrapure water was prepared in by adding 1g of the test substance to 1 L of ultrapure water. The clear solution was transferred to the measuring vessel. The solution allowed stabilising at the test temperature (20°C). The surface tension was determined to be 68.1 mN/m at 20 °C. It was concluded that the test item is not surface active (surface tension > 60 mN/m).