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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12.06.2012-16.08.2012
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:
no
Type of method:
OECD harmonised ring method
Key result
Surface tension:
> 68.1 - < 74.5 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Determination 1

Determination 2

Calibration factor (Φ a)

1.081

Application rate

0.10 g / 100 ml (deionized water)

Time between preparation and measurement of the solution [min]

90

Measurement temperature [ºC]

20

Time between individual measurements [s]

30

Measured values [mN/m]

68.0 / 68.2 / 68.2 / 68.5 / 68.5 / 68.5

≡ 68.3

72.2 / 72.4 /72.3 / 72.4 / 72.4 /72.4

≡ 72.4

Values x calibration factor (Φ a) [mN/m]

73.8

78.3

Precise values after interpolation according to Harkins and Jordan [mN/m]

69.0

73.5

≡ 71.3 ± 3.2

Conclusions:
The surface tension is 71.3 ± 3.2

Description of key information

The surface tension at 20ºC is 71.3 ± 3.2

Key value for chemical safety assessment

Surface tension:
71.3
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information