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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 10 April 2018 to 20 June 2018
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
Specific details on test material used for the study:
All solutions containing the test item were protected from light.
Key result
Surface tension:
63.4 mN/m
Temp.:
20 °C
Remarks on result:
other: Conc.= 90% of test item saturation solubility

Table: Surface tension measurements

Measurement

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

Surface tension
(mN/m)

individual

mean

mean (1)

1

15

65.6

65.4

63.4

2

16

65.4

 

 

3

17

65.4

 

 

4

18

65.5

 

 

5

19

65.2

 

 

(1) Mean multiplied by the calibration factor and Harkins-Jordan corrected.

Conclusions:
The surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 63.4 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% of its saturation solubility was determined to be 63.4 mN/m (at 20°C). According to EC A.5 the substance is not surface active. Taken the water solubility into account, the concentration tested is at approximate 1 mg/L.

Description of key information

Surface tension at 20°C for aqueous solution: 63.4 mN/m (EC A.5, OECD 115: OECD harmonised ring method)

Key value for chemical safety assessment

Surface tension:
63.4
in mN/m at 20°C and concentration in mg/L:
1

Additional information

Concentration tested: 90% of substance's saturation solubility in water (i.e. at approximate 1 mg/L)

According to the EC A.5 guideline the substance is not surface active.

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