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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:
19 September 2017
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)
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Surface tension:
>= 42.1 - <= 42.3 mN/m
Temp.:
20 °C
Remarks on result:
other: uncorrected values first test
Surface tension:
>= 42.7 - <= 42.8 mN/m
Temp.:
20 °C
Remarks on result:
other: uncorrected values second test

Test No.

Weighed amount per 100 mL[mg]

Mean temperature[°C]

Mean Surface Tension
(measured)[mN/m]

Φb-corrected
Mean Surface Tension

[mN/m]

Age of solution [h]

 

 

1

106

20.0

42.2

43.1

0.9

2

106

20.0

42.7

43.6

0.9

Mean:

106

20.0

42.5

43.4

0.9

Φb = calibration factor

Nominal surface tension of ultra-pure water at 20 °C
[mN/m]

Determined mean surface tension of ultra-pure water
[mN/m]

Calibration factor

Φb

72.75

71.3

1.0203

Conclusions:
The surface tension was determined to be 43.4 mN/m at 20.0 °C.
Executive summary:

In a test using the ring method the substance was found to be surface active.

The mean of two determinations of the surface tension was determined to be 43.4 mN/m at 20.0 °C.

Description of key information

In a test using the ring method the substance was found to be surface active.

The mean of two determinations of the surface tension was determined to be 43.4 mN/m at 20.0 °C.

Key value for chemical safety assessment

Surface tension:
43.4
in mN/m at 20°C and concentration in mg/L:
1 060

Additional information