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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:
November 27th, 2012 - April 7th, 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
(2008)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
(1995)
Deviations:
no
GLP compliance:
yes
Type of method:
OECD harmonised ring method
Key result
Surface tension:
65.2 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Table: Surface tension measurements

 

Measurement

 

 

 

Time passed [minutes]

 

 

Surface tension

[mN/m]

Individual

 

mean (1)

 

mean corrected (2)

 

1

61

63.0

 

 

2

62

63.0

64.4

65.2

3

63

64.3

 

 

4

64

64.2

 

 

5

65

64.3

 

 

6

66

64.6

 

 

7

67

64.6

 

(1) Mean calculated from measurements 3 to 7.  

(2) Multiplied by the calibration factor followed by correction according to Harkins-Jordan.

 

Conclusions:
Using the OECD Harmonized ring method (in accordance with EC A.5 and OECD 115 and in compliance with GLP), the surface tension of an aqueous test substance solution at 1 g/L was measured to be 65.2 mN/m at 20°C. Because the surface tension is not < 60 mN/m, the substance is not surface active.

Description of key information

Using the OECD Harmonized ring method (in

accordance with EC A.5 and OECD 115

and in compliance with GLP), the

surface tension of an aqueous

test substance solution at 1 g/L

was measured to be 65.2 mN/m at 20°C.

Key value for chemical safety assessment

Surface tension:
65.2
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

Because the surface tension is not < 60 mN/m, the substance is not surface active.