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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:
2010-11-04 to 2010-02-18
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 2009-10-29
Type of method:
OECD harmonised ring method
Key result
Surface tension:
44.4 mN/m
Temp.:
20 °C
Conc.:
90 vol%
Remarks on result:
other: mean value of six measurements
































Measurement



1



2



3



4



5



6



Time (s)



491



542



793



945



1095



1247



 σ (mN/m)



44.01



44.45



44.08



44.81



44.37



44.55




Mean value:  σ = 44.4 mN/m (corrected by Zuidema and Waters) .


Due to the fact that the surface tension is lower than 60 mN/m, the test item has surface-active properties.

Conclusions:
According to OECD Guideline 115 (1995) and EU Method A.5 (2008), the surface tension of an 90% aqueous solution is 44.4.0 mN/m at 20°C. Hence, the substance has surface-active properties.

Description of key information

The test substance has surface-active properties (44.4 mN/m at 20°C; 90 vol% aqueous solution).

Key value for chemical safety assessment

Surface tension:
44.4
in mN/m at 20°C and concentration in mg/L:
16.2

Additional information