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Physical & Chemical properties

Surface tension

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Link to relevant study record(s)

Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 11 Aug 2020 to 17 Aug 2020
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
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:
32.1 mN/m
Temp.:
20 °C
Remarks on result:
other: Conc.= 90% saturation in water

Table: Surface tension measurements

Measurement

Time passed after measurement start
[seconds]

Surface tension
(mN/m)

individual σ multiplied by

Harkins-Jordan corrected value

mean σ *

 

1

33.97

32.55

32.11

2

58.58

32.43

 

3

77.58

32.02

 

4

100.10

31.96

 

5

127.86

32.33

 

6

146.54

31.92

 

7

174.07

32.31

 

* Mean calculated from measurements 3 to 7, after equilibrium was reached.

Conclusions:
The surface tension of an aqueous substance solution at 90% saturation was determined to be 32.1 mN/m (at 20°C).

Executive summary:

The OECD harmonized ring method was used in a GLP study based on EC A.5 and OECD 115. The surface tension of an aqueous substance solution at 90% saturation was determined to be 32.1 mN/m (at 20°C). According to EC A.5 the substance is surface active. 

Description of key information

The OECD harmonized ring method was used in a GLP study based on EC A.5 and OECD 115. Thesurface tension of an aqueous substance solution at 90% saturation was determined to be 32.1 mN/m (at 20°C). According to EC A.5 the substance is surface active.

Key value for chemical safety assessment

Surface tension:
32.1
in mN/m at 20°C and concentration in mg/L:
900

Additional information