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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:
Study initiation date: 29 July 2009 Study completion date: 19 November 2009
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:
adopted on 27 July 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
Official Journal L 383 A 1992
Deviations:
no
GLP compliance:
yes
Type of method:
ring method
Key result
Surface tension:
35.3 mN/m
Temp.:
20 °C
Conc.:
0.63 g/L

Details on measurement results are given in the following table:

 

First run

Second run

Number of measurements

10

10

Total measuring time [min:s]

5:58

5:57

Measuring time of the last 10 measurements [min:s]

5:58

5:57

Measurement 1

35.24

35.41

Measurement 2

35.23

35.40

Measurement 3

35.22

35.40

Measurement 4

35.22

35.41

Measurement 5

35.22

35.41

Measurement 6

35.22

35.41

Measurement 7

35.23

35.41

Measurement 8

35.23

35.41

Measurement 9

35.22

35.42

Measurement 10

35.23

35.42

Mean value [mN/m]1)

35.23

35.41

Surface tension [mN/m]2)

35.2

35.4

Mean value [mN/m]

35.3

1) Mean value of the last ten measurements

2) corrected mean value (measured value x apparatus factor = corrected value)

Conclusions:
Surface tension (OECD 115) : 35.3 mN/m (at 20°C)
The test item is considered to be surface active.
Executive summary:

The surface tension of aqueous solutions of the test item was determined compliant with GLP according to OECD guideline no. 115 [adopted on 27 July 1995] and EU test method A.5 [Directive 92/69/EEC, Official

Journal L 383 A 1992] with the ring method.

The reliable study produced the following results:

Surface tension (at 20°C): 35.3 mN/m

The test item is considered to be surface active.

Description of key information

Surface tension (OECD 115): 35.3 mN/m at 20°C (630 mg/L)

Key value for chemical safety assessment

Surface tension:
35.3
in mN/m at 20°C and concentration in mg/L:
630

Additional information

The surface tension of aqueous solutions of the test item was determined compliant with GLP according to OECD guideline no. 115 [adopted on 27 July 1995] and EU test method A.5 [Directive 92/69/EEC, Official

Journal L 383 A 1992] with the ring method. The reliable study produced the following results:

Surface tension (at 20°C): 35.3 mN/m (630 mg/L).

The test item is considered to be surface active.

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