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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 June 2009 Study completion date: 19 October 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:
Directive 92/69/EEC, Official Journal L 383 A 1992
Deviations:
no
GLP compliance:
yes
Type of method:
ring method
Key result
Surface tension:
68.5 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Details on measurements:

 

First run

Second run

Number              of

measurements

10

10

Total measuring time [min:s]

7:26

6:05

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

4:30

6:05

Measurement 1

68.24

69.14

Measurement 2

68.19

69.03

Measurement 3

68.13

69.02

Measurement 4

68.09

68.99

Measurement 5

68.06

68.98

Measurement 6

68.03

68.96

Measurement 7

68.01

68.95

Measurement 8

68.00

68.94

Measurement 9

67.97

68.94

Measurement 10

67.95

68.92

Mean value [mN/m]1)

68.07

68.99

Surface tension [mN/ m]2)

68.07

68.99

Mean value [mN/m]

68.5

 

1) Mean value of the last ten measurements

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

Conclusions:
Surface tension (OECD 115): 68.5 mN/m (at 20°C, 1 g/L test item)
Executive summary:

The surface tension of aqueous solutions of the test item was determined in a GLP compliant study 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.

Surface tension (at 20°C; 1 g/L test item): 68.5 mN/m

In conclusion, the test substance isopropylamine is not surface active.

Description of key information

Surface tension (OECD 115): 68.5 mN/m (at 20°C, 1 g/L test item)

Key value for chemical safety assessment

Surface tension:
68.5
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The surface tension of aqueous solutions of the test item was determined in a GLP compliant study 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.

Surface tension (at 20°C; 1 g/L test item): 68.5 mN/m

In conclusion, the test substance isopropylamine is not surface active.