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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:
11'/2019
Reliability:
1 (reliable without restriction)
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
not applicable
Principles of method if other than guideline:
The surface tension of the substance was determined by the Wilhelmy plate method, equivalent or similar to OECD 115.
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
plate method
Key result
Surface tension:
72.75 mN/m
Temp.:
20 °C
Conc.:
500 mg/L

Table: Surface Tension Measurement Data


 



















































           Surface tension [mN/m]
 Sample# 0.05% 0.5%
 

 1


 72.75 1 72.93
  2 72.74 2 72.60
  3 72.76 3 72.27
  Mean value 72.75  72.60
  Std. dev. 0.01  0.33

 


There is no significant difference between the surface tension values of the 0.50% solution and the 0.05% solution

Conclusions:
The substance is not surface active.
Executive summary:

The objective of the study was to evaluate the surface tension of two aqueous solutions of the substance (0.05 and 0.5% w/w) using the Wilhelmy plate method. Mean surface tension values of the 0.50% and the 0.05% solution were 72.60 and 72.75 mN/m. Hence, the substance has no surface activity.

Description of key information

The substance did not have surfactant properties when tested at two concentrations (500 and 5000 mg/L) with the plate method. The results are consistent with those of CB[8], which had a surface tension of 72.7 mN/m in a GLP study using the ring method in accordance with OECD guideline 115 and EU method A5.

Key value for chemical safety assessment

Surface tension:
72.7
in mN/m at 20°C and concentration in mg/L:
500

Additional information

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