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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:
2006-06-22 to 2006-09-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same 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:
yes (incl. QA statement)
Remarks:
signed 2005-06-09
Type of method:
OECD harmonised ring method
Surface tension:
72 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Test temperature: 20 °C

Solution concentration: 1 g/L

Solution age: Prepared immediately before measurement

Initial values for the surface tension were obtained as soon as possible after transfer of the aqueous solution to the measurement vessel.

Time (minutes)

Surface tension (mN/m)

Measured

Calibration corrected

A

B

A

B

0

72.5

72.5

72.5

72.5

5

72.5

72.5

72.5

72.5

10

72.0

72.5

72.0

72.5

15

72.5

73.0

72.5

73.0

20

72.5

72.5

72.5

72.5

25 72.5 72.5 72.5 72.5
30 72.5 72.5 72.5 72.5

From the results there was no apparent time dependence of surface tension after transfer to the measuring vessel.

Overall mean calibration corrected surface tension = 72.5 mN/m

Harkins-Jordan* corrected value = 72.0 mN/m [*HARKINS, W.D. and JORDAN, H.F., J. Amer. Chem. Soc. 52, 1751 (1930).

Conclusions:
The surface tension of a 1 g/l aqueous solution of DIGIRENA SA TEMABF4 anhydrous was found to be 72.0 mN/m. As the result is greater than 60 mN/m, the test substance is not considered to be surface active.

Description of key information

The surface tension of a 1 g/L aqueous solution of DIGIRENA SA TEMABF4 anhydrous was found to be 72.0 mN/m. As the result is greater than 60 mN/m, the test substance is not considered to be surface active.

Key value for chemical safety assessment

Surface tension:
72
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

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