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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
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)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
OECD harmonised ring method
Key result
Surface tension:
69.5 mN/m
Temp.:
20 °C
Conc.:
90 other: % saturated aqueous solution

Time

Surface tension (mN/m)

(minutes)

(calibration corrected)

 

 

A

B

 

 

 

 

 

0

72.2

70.2

 

5

72.2

70.2

 

10

71.2

70.2

 

15

70.2

70.2

 

20

70.2

69.7

 

25

70.7

69.7

 

30

70.2

70.7

 

 

 

 

 

 

Overall mean calibration corrected surface tension = 70.5 mN/m

Harkins-Jordan* corrected value = 69.5 mN/m

 

*: HARKINS, W.D. and JORDAN, H.F., J. Amer. Chem. Soc.52, 1751 (1930).

Conclusions:
The test substance is not considered to be surface active (surface tension >60 mN/m).

Description of key information

69.5 mN/m (90% satuarated aqueous solution at 20°C) (OECD 115, EC A.5)

Key value for chemical safety assessment

Additional information

Surface tension 69.5 mN/m at 20°C and 90% satuarated aqueous solution