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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:
28 Oct.-29 Oct. 2014
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)
Remarks:
Hess. Ministerium für Umwell, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
Type of method:
ring method
Surface tension:
46.6 mN/m
Temp.:
20 °C
Conc.:
1 g/L

The results of two measurements are shown in the following table:

 

Value No.

1stmeasurement (10 min after preparing the solution) σ[mN/m]

2ndmeasurement (50 min after preparing the solution) σ[mN/m]

1

46.70

46.57

2

46.68

46.55

3

46.67

46.53

4

46.66

46.53

5

46.66

46.52

6

46.65

46.53

Mean

46.67 ± 0.02

46.54 ± 0.02

Total mean

46.61 ± 0.09

 

The test item has a mean surface tension of 46.6 mN/m. Thus, the test item is to be regarded as surface active.

Description of key information

46.6 mN/m at 20 °C and concentration in 1 g/L (OECD 115, A.5.)

Key value for chemical safety assessment

Surface tension:
46.6
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The surface tension of test item was determined by ring method.

Based on the testing result, the test item is to be regarded as surface active.