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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:
From June 12, 2017 to September 20, 2017
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:
2008
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:
32.9 mN/m
Temp.:
20 °C
Remarks on result:
other: Conc.= 90% of saturation solubility

Table: Surface tension measurements

 

Measurement

Time passed after transfer test solution to test vessel
[minutes]

Surface tension [mN/m]

individual

mean (1)

mean (2)

1

15

37.6

35.1

32.9

2

16

35.0

 

 

3

17

35.1

 

 

4

18

35.1

 

 

5

19

35.2

 

 

6

20

34.9

 

 

(1) Calculated from measurements 2 to 6, after equilibrium was reached.

(2) Multiplied by the calibration factor and Harkins-Jordan corrected.

Conclusions:
Under the study conditions, the surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 32.9 mN/m (at 20°C). According to the EU Mrthod A.5 the substance is surface active.

Executive summary:

A study was conducted to determine the surface tension of the test substance using ring method according to OECD Guideline 115, EU Method A.5. Under the study conditions, the surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 32.9 mN/m (at 20°C). According to the EU Mrthod A.5 the substance is surface active (Reingruber, 2017).

Description of key information

The surface tension was determined according to OECD Guideline 115 and EU Method A.5 (Reingruber, 2017).

Key value for chemical safety assessment

Surface tension:
32.9
in mN/m at 20°C and concentration in mg/L:
0.9

Additional information

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