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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:
March to May 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Key result
Surface tension:
70.8 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: The mean surface tension of the test solution was multiplied by the calibration factor followed by correction according to Harkins-Jordan.

Table: Surface tension of the test substance

* =  = mean multiplied by correction factor and Harkins-Jordan corrected value

 ** = mean calculated from measurements 3 to 7, after equilibrium was reached

    Measurement

 Time passed [min]           Surface tension [mN/m]
 individual  mean  corrected mean*
 1  20  67.1 69.5 **                    70.8                   
 2  21  68.3
 3  22  69.5
 4  23  69.3
 5  24  69.7
 6  25  69.4
 7  26  69.5
Conclusions:
The OECD harmonized ring method was used for the determination of the surface tension of Sodium toluenesulphonate. The surface tension of a test solution at a concentration of 1 g/L in water and at 20 °C was 70.8 mN/m. The test substance was considered not to be surface active.
Executive summary:

The surface tension of Sodium toluenesulphonate was determined according to OECD Guideline for the Testing of Chemicals No. 115: "Surface Tension of Aqueous Solutions", July 27, 1995 and European Community, EC No. 440/2008, Part A: Methods for the Determination of Physico-chemical Properties, Guideline A.5: "Surface Tension", Official Journal of the European Union No. L142, May 31, 2008.

The OECD harmonized ring method was used for the determination of the surface tension of Sodium toluenesulphonate. The surface tension of a test solution at a concentration of 1 g/L in water and at 20 °C was 70.8 mN/m. The test substance was considered not to be surface active.

Description of key information

Surface tension of sodium toluenesulphonate (1 g/L) = 70.8 mN/m at 20 °C, determined by the OECD harmonized ring method. The substance was considered not to be surface active.

Key value for chemical safety assessment

Surface tension:
70.8
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information