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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
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)
GLP compliance:
yes
Type of method:
ring method
Surface tension:
71.3 mN/m
Temp.:
20 °C
Conc.:
1.055 other: g/L (given as sodium 2-biphenylate tetrahydrate)
Remarks on result:
other: not surface active

Time passed between preparation and the first measurement: 25 minutes

Surface tension:

 Determination

 Time expired*

[min]

 measured surface tension

[mN/m]

 1  15  71.9
 2  16  72.0
 3  17  71.9
 4  18  72.1
 5  19  72.0

* Time passed since the solution was transferred to the measurement vessel

mean surface tension, not corrected: 72.0 mN/m

mean surface tension, corrected for calibration: 71.3 mN/m

mean surface tension corrected using Harkins&Jordan, 1930: 71.3 mN/m

calibration factor: 0.990

 

Description of key information

not surface active

(EU Method A.5)

Key value for chemical safety assessment

Surface tension:
71.3
in mN/m at 20°C and concentration in mg/L:
1 055

Additional information

(concentration given as sodium 2-biphenylate tetrahydrate)

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