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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:
2011-11-23 to 2011-11-24
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:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2010-10-20
Type of method:
OECD harmonised ring method
Key result
Surface tension:
41.85 mN/m
Temp.:
20.1 °C
Conc.:
90 vol%
Remarks on result:
other: standard deviation: 0.03 mN/m

Determination of the Density


The density of the 90 % saturated aqueous solution of the test item in double-distilled water was determined in a preliminary measurement to be 1.002 g/cm3 (20.1 °C).


               


Temperature


The temperature of the test mixture during the measurements was 20.1 °C. The room-temperature during the measurement was 20.3 to 20.6 °C.


 


Validation


The surface tension of the reference item hexane was determined on 2011-03-15 with 18.28 ± 0.01 mN/m (20 °C) for the Ring (Nr. 1, RI 21. This value is in the range of tolerance of ± 1 mN/m acc. to the literature value of 18.42 mN/m at 20 °C.

Conclusions:
According to Regulation EC 440/2008 Method A.5 and OECD 115 the surface tension of a 90 % saturated aqueous solution mixture of the test item was determined to be 41.85 mN/m with a standard deviation of 0.03 mN/m at a mean temperature of 20.1 °C. Due to the fact that the surface tension is < 60 mN/m, the test item has surface-active properties.

Description of key information

key data surface tension: 41.85 mN/m

Key value for chemical safety assessment

Surface tension:
41.85
in mN/m at 20°C and concentration in mg/L:
110.88

Additional information

According to Regulation EC 440/2008 Method A.5 and OECD 115 the surface tension of a 90 % saturated aqueous solution mixture of the test item was determined to be 41.85 mN/m with a standard deviation of 0.03 mN/m at a mean temperature of 20.1 °C. Due to the fact that the surface tension is < 60 mN/m, the test item has surface-active properties.